Types of Leather: The Tannage, Grade, and Weight Guide

Leather types are categorized along three independent axes: tannage (vegetable, chrome, combination, brain), grade (full grain, top grain, genuine, bonded), and weight (1 ounce thin lining stock through…

Leather types are categorized along three independent axes: tannage (vegetable, chrome, combination, brain), grade (full grain, top grain, genuine, bonded), and weight (1 ounce thin lining stock through 10 ounce belt blanks). Picking the right combination for a project is the single biggest factor in whether your finished piece looks professional or homemade — a $30 wallet built from the wrong leather looks worse than a $5 wallet built from the right one.

This guide covers every leather selection decision a leatherworker faces before they place an order: which tannage to choose for a wallet vs a backpack vs a belt, why full-grain commands premium prices and when top-grain is the right call instead, how to read tannery weight specifications without ending up with belt-thick stock for a card holder, and which animal sources (cow, goat, kangaroo) suit which projects. Linked deep-dives expand each comparison.

I started leatherworking by buying a bag of “genuine leather scraps” from a craft store. None of it would burnish, dye, or hold a stitch line — and I spent weeks thinking I was bad at the craft when the real problem was the material. Vegetable-tanned full-grain leather from a named tannery (I use Hermann Oak and Wickett & Craig) costs about $10 more per hide section and teaches you what the tools are actually supposed to do. The tannage and grade breakdowns below are what I wish someone had explained before my first order.

The Three Axes That Define Every Hide

Every piece of leather can be described by three independent properties: how it was tanned, what part of the hide grade was retained, and how thick it is. Talking about leather without those three numbers is like talking about lumber without species, grade, and thickness — vague enough to be useless. Suppliers list all three on every spec sheet; learn to read them and ordering becomes precise.

For a refresher on where leather selection fits in the broader skill stack, the leather working for beginners hub covers the six core skills (cut, edge, stitch, dye, hardware, pattern) in sequence. Leather selection precedes all of them — the wrong leather makes every subsequent step harder. Spend more time picking the right hide than you do on any other decision in your project.

Tannage: How the Hide Becomes Leather

Raw animal hide rots in days. Tanning is the chemical process that crosslinks the protein fibers in raw hide so they resist decay and water damage. The four major tannage categories are vegetable (using bark and plant tannins), chrome (using chromium salts), brain (using animal brain emulsion), and combination (combinations of the above). Each produces dramatically different working properties.

Vegetable tanning is the oldest method, dating back at least 6,000 years. The hide soaks in pits of bark-extract solution for 30-60 days, slowly absorbing tannins that bond to the collagen fibers. The result is firm, water-resistant leather that accepts dye, takes tooling impressions, burnishes smooth, and develops patina. Vegetable-tanned leather is the standard for hand-stitched leather goods — wallets, belts, holsters, sheaths, bound books, saddlery. About 95% of all hand-stitched leather projects use veg-tan.

Chrome tanning uses chromium-salt solutions that complete the tanning process in 24-48 hours rather than 30-60 days. The result is softer, drapeable leather that holds vivid colors but rejects most penetrating dyes. Chrome leather is the standard for shoes, jackets, upholstery, and bag linings — anything that needs to flex repeatedly without cracking. About 85% of all leather produced globally is chrome-tanned because production is faster and cheaper.

Brain tanning is the traditional Native American method using animal brain emulsion. The result is unusually soft, breathable leather (common for moccasins and historical reproductions). Brain-tanned leather is rare commercially and used almost exclusively by historical reenactors and traditional craft practitioners. Combination tanning uses chrome first (for softness) then veg-tan (for body) and produces leathers that balance flexibility and stiffness — popular for handbags and luggage.

For dye selection on each tannage, the best leather dye for veg-tan review covers alcohol and oil dyes specifically formulated for vegetable-tanned leather; the dye without streaks tutorial covers the prep sequence that makes dye uptake reliable on veg-tan. Chrome-tanned leather rarely needs dyeing because it ships pre-dyed; if you must color chrome leather, surface-acrylic dyes (Angelus) are the only practical option.

Grade: How Much of the Hide Was Kept

The grade scale describes how much of the natural hide surface remains in the finished leather. Full-grain retains the entire surface intact; top-grain has the upper surface sanded off to remove blemishes; corrected-grain has the surface aggressively sanded and an artificial grain embossed on; genuine leather is recombined fibers with surface coating; bonded leather is shredded fiber pulp with adhesive. Higher grades cost more and last dramatically longer.

The full grain vs top grain leather guide covers the full-vs-top-grain distinction in detail: full-grain develops the rich patina the hobby is famous for; top-grain stays flatter and less interesting but hides cosmetic blemishes more reliably. For first projects, full-grain veg-tan is the canonical choice because the patina forgives early-stage technique imperfections.

Below top-grain, the quality drops dramatically. Corrected-grain leather has had so much sanding done that the embossed surface is what you see — and that surface delaminates after 1-2 years of use. Genuine leather is recombined leather scrap held together with adhesive; it splits and cracks under flex. Bonded leather is leather dust mixed with polymer; it disintegrates within months on flex points. Avoid these three categories for any hand-stitched project.

“Genuine leather” is a loaded term. Marketing departments use it to imply quality, but the phrase legally describes the lowest grade of actual leather (above bonded but below corrected-grain). When a product label says nothing more specific than “genuine leather,” assume the lowest legally defensible interpretation. Quality leather goods specify “full-grain” or “top-grain” by name; the absence of those terms is a signal.

Weight: How Thick the Leather Is

Leather weight is measured in ounces per square foot in the imperial system, or millimeters of thickness in the metric system. Suppliers list nominal weight ranges (e.g., “4-5 oz”) because hide thickness varies across the body. The conversion is roughly 1 ounce equals 0.4 millimeters; 5 ounces equals 2.0 mm. Weight controls what you can build — picking the wrong weight is the most expensive single mistake a beginner makes.

For wallet building, 4-5 oz (1.6-2.0 mm) is the universal exterior weight, paired with 2-3 oz (0.8-1.2 mm) for interior pocket linings. The best leather for wallets guide covers exterior and lining selection in detail. For belts, 7-9 oz (2.8-3.6 mm) is the standard; under 7 oz produces a flimsy belt that curls; over 9 oz produces a belt that is hard to fold around hardware.

Thinner leathers (1-2 oz, 0.4-0.8 mm) are used for bag linings, gloves, and shoe uppers. Mid-weights (3-5 oz, 1.2-2.0 mm) cover the bulk of small-leather-goods (wallets, card holders, watch straps, key fobs). Heavier weights (5-8 oz, 2.0-3.2 mm) cover bags, holsters, and structured pieces. Heaviest weights (8-12 oz, 3.2-5.0 mm) are belt blanks, saddle skirting, and tool sheaths.

Splitting and skiving are the techniques that adjust weight after the hide is sourced. A splitter machine reduces overall thickness; a skiving knife thins specific areas (e.g., the fold of a wallet) without affecting the rest. Most beginners do not own splitters and instead order their target weight directly from the tannery; skiving knives are a moderate $20-30 investment that pays off on second project onwards.

Animal Source: Cow, Calf, Goat, Kangaroo, Exotic

The animal that produced the hide affects the working properties as much as the tannage. Cow leather (the default, used in 95% of leather goods) is uniform, durable, and available in every weight. Calf leather is tighter-grained, softer, and more expensive. Goat leather is irregular-grained but unusually strong for its weight (popular for jackets and gloves). Kangaroo leather is the finest-grained and strongest-per-weight (used in high-end shoes and motorcycle gloves). Exotic leathers (alligator, ostrich, snake, stingray) are decorative and extremely expensive.

For hand-stitched leather goods, cow leather covers 90%+ of all projects. Within cow, the most common variants are bridle leather (English-style, oil-dressed, used for premium belts and equestrian goods), Latigo (oil-and-wax dressed, used for tack and outdoor goods), saddle skirting (heavy weight, firm temper, used for saddles and holsters), and English bridle (premium hand-finished, used for $200+ wallets and belts).

Tannery names matter more than animal source for most beginners. Wickett & Craig (US, Pennsylvania) is the standard for premium veg-tan; Hermann Oak (US, Missouri) is the historical brand favored by saddlery; Sedgwick (UK) is the standard for English bridle leather; Tärnsjö (Sweden) is premium veg-tan with exceptional consistency. Buying from any of these four costs more per square foot but eliminates 90% of “bad hide” lottery — the leather lays consistently with predictable working properties.

For exotic and specialty leathers, the price-to-skill curve is steep. Beginners should master cow leather (probably for at least 30 projects) before attempting alligator, snake, or kangaroo. Exotic hides are unforgiving of cutting errors, expensive to replace, and require specialized cutting and stitching techniques.

Leather Selection By Project Type

Each project type has a typical leather specification. Use the table below as a starting point; adjust based on individual project goals (lighter weight for travel-friendly wallets, heavier weight for daily-carry holsters, etc.).

The bifold wallet build guide uses the wallet specification above; the card holder pattern uses the card holder specification. Both projects are forgiving of minor leather variations as long as you stay within the recommended ranges.

Reading Tannery Spec Sheets

Tannery websites and catalogs use shorthand that confuses beginners. The standard spec line looks like: “Hermann Oak Russet 4-5 oz Full Grain Veg-Tan Side.” That breaks down as: tannery name (Hermann Oak), color/finish (Russet — natural undyed), weight range (4-5 oz), grade (Full Grain), tannage (Veg-Tan), and cut format (Side — half a hide, the most common purchase format).

Cut formats matter. A “side” is half a hide split lengthwise; a “shoulder” is the front quarter of a hide; a “belly” is the lower section (softer, more stretchy); a “back” is the central section (firmest temper, most consistent). Beginners should buy sides — they offer the most material per dollar and contain a mix of qualities for learning.

“Temper” describes how stiff the leather feels. Tannery descriptions use terms like “firm temper” (stiffer, holds shape well, used for belts and holsters), “regular temper” (medium stiffness, used for wallets and small goods), “soft temper” (drapeable, used for bags and clothing). Temper is partly a tannage choice and partly a finishing choice; ask the tannery if unclear.

Pricing per square foot varies dramatically by quality. Wickett & Craig and Hermann Oak full-grain veg-tan costs $8-15 per square foot at retail; a typical wallet uses 0.8-1.2 sq ft including waste. Bonded leather costs $1-2 per square foot but should be avoided. The cheapest reliable working leather is Tandy’s Craftsman Oak at $5-7 per sq ft — acceptable for practice, lower-quality finish than premium tanneries.

Leather Storage and Handling

Leather is hygroscopic — it absorbs and releases moisture from the air. Long-term storage requires a stable environment: 40-60% relative humidity, 60-75°F temperature, no direct sunlight, no contact with metal (which can transfer rust stains). Leather rolled with the grain side facing inward stays flatter than leather stored flat under weight.

The 3D-printed leather tooling guide covers printable storage solutions (rolled-leather holders, hide-rack systems) for workshop organization. Most working leatherworkers buy hides as needed rather than stockpiling; warehoused leather can dry out, fade, or absorb moisture before use.

Handling fresh hides: pick up by the corners, never with hooks or clamps that can leave marks. Lay flat on clean surfaces only — wood, denim canvas, or kraft paper. Avoid contact with hand creams, hair products, or food oils; finger oil transfers permanently to natural leather and shows up as dark spots after dyeing.

For leather that has dried out (months in dry storage), restoration is possible: condition with neatsfoot oil (one thin coat with a damp cotton cloth, allow 12 hours to penetrate, repeat if needed), or use a leather conditioner like Bick 4 or Aussie. Over-conditioning is worse than under-conditioning — too much oil produces a greasy surface that resists dye. Apply minimum needed and stop.

Faux Leather and Alternatives

Faux leather (sometimes called PU leather, polyurethane leather, or vegan leather) is plastic — typically polyurethane or polyvinyl chloride bonded to a fabric backing. It looks like leather at a distance but lacks the breathability, patina development, and longevity of real leather. Faux leather is suitable for fashion items with short product lifecycles; it is unsuitable for hand-stitched goods that should last decades.

Mushroom leather (Mylo, made from mycelium) and pineapple leather (Piñatex, made from pineapple leaf fibers) are emerging alternatives positioned as sustainable replacements for cattle leather. Their working properties differ from animal leather and are still being characterized. For beginners, these are experimental rather than reliable choices.

Some leatherworkers explore alternative working surfaces. Laser engraving on vegetable-tanned leather is a popular adjunct technique that adds branded marks; CNC-cut leather patterns and form blocks covers production-scale cutting. Both work best on full-grain veg-tan because the cut quality and engraving response are most predictable.

Frequently Asked Questions

Related Guides

• Full Grain vs Top Grain Leather Explained
• Best Leather for Wallets: Thickness, Type, Grain
• Best Leather Dye for Veg-Tan: 8 Brands Tested
• Leather Working for Beginners: Complete Starter Guide
• How to Make a Leather Bifold Wallet

Written by Kenny Nyhus Fadil

I'm Kenny Nyhus Fadil, publisher of LeatherCraft Haven and the broader Sovereign Fortress network of niche hobbyist sites. I run this site directly—no team of ghost-writers, no fake personas.

Read the full story →