COM and COL, Without the Guesswork: A Specifier's Guide

Every designer who works in custom upholstery learns COM the same way: by getting it wrong once. A fabric arrives at the workroom two yards short. A leather hide turns out to be too small for the seat panel it was specified for. An install date moves because nobody confirmed the railroading before the bolt shipped.

None of this is difficult. It is simply undocumented. Most of what a specifier needs to know about Customer's Own Material lives in the heads of workroom managers and gets transmitted by phone, one correction at a time. What follows is that knowledge, written down.

What the terms actually mean

COM stands for Customer's Own Material. You source the fabric, you buy it, and you ship it to the manufacturer, who upholsters the frame in it. The maker charges you for the frame and the labor; the textile is yours and never appears on their invoice.

COL stands for Customer's Own Leather. The same arrangement, with hides instead of fabric. It is broken out separately because leather behaves differently in almost every respect that matters: it is measured in square feet rather than yards, it cannot be cut against a repeat, and it carries natural variation that a bolt of fabric does not.

The reason both exist is straightforward. A furniture maker carries a curated library of textiles. A designer working on a specific room does not want the curated library. They want the one fabric that resolves the scheme. COM is the mechanism that lets a custom piece meet a specific interior.

Yardage: the number everyone gets wrong

The single most common failure in a COM order is under ordering. It is worth understanding why the number your workroom quotes is larger than the number you expected.

A yardage estimate assumes 54 inch plain goods, no repeat, no directional requirement. That is the baseline. Every deviation from it increases the requirement.

A pattern repeat adds material, because every panel must be cut to align. A large repeat, anything above roughly 18 inches, can add 15 to 25 percent to the total.

A narrower bolt raises the number proportionally. A 45 inch fabric is not 45/54ths of the yardage. It is often worse, because narrow width forces less efficient nesting of the cutting pattern.

Railroading can reduce yardage on a long piece, but only if the fabric permits it. Some do not.

A directional or napped fabric (velvet, mohair, anything with a pile) must run one way across the whole piece. Panels can no longer be rotated to fit the cutting layout.

Channeling, tufting, or a skirt each add material beyond the base estimate.

The practical rule: ask for the yardage estimate against your actual fabric, not against a generic frame. Send the maker the fabric name, width, repeat, and finish before you place the textile order. A five minute email eliminates the most expensive error in the process.

For COL, the equivalent rule is to think in hides rather than square feet. A hide averages 50 to 55 square feet, but usable area is smaller. Brands, scars, and neck wrinkles cannot be cut into a seat panel. Most workrooms apply a 20 to 25 percent waste factor to leather. If a piece calls for 90 square feet, order three hides, not two.

Why a fabric gets rejected

Not every textile can be upholstered onto every frame, and a maker who accepts an unsuitable COM is doing you no favors. Fabrics are commonly declined for four reasons.

Insufficient abrasion resistance. Residential seating generally wants 15,000 double rubs (Wyzenbeek) or higher; contract applications require considerably more. A beautiful drapery weight silk on a dining chair is a warranty claim waiting to happen.

Excessive stretch or instability. Loose weaves and unbacked knits distort under tension and will not hold a crisp line over a tight seat.

Weight outside the workable range. Very heavy fabrics cannot be pulled into tight radii or fine detailing. Very light ones telegraph every substrate imperfection beneath them.

Backing that fights the frame. Acrylic backed and heavily finished goods resist the compound curves on a rolled arm.

When a fabric is declined, the workroom is not being difficult. They are declining to warrant a result they cannot control.

The approval sequence that keeps a project on schedule

COM introduces a second supply chain into an order, and the two must converge before production begins. The sequence that works:

1. Confirm the frame and yardage first. Get the estimate against your specific fabric before you buy anything.
2. Send a cutting for approval. Most makers want a physical sample to test how the material behaves. This is where a problem surfaces cheaply.
3. Place the textile order with the maker's ship to address and sidemark. The sidemark is what connects an unmarked box arriving at a receiving dock to your order. Fabric without a sidemark can sit unidentified for weeks.
4. Confirm receipt and inspection. Reputable workrooms measure and inspect on arrival. This is when a short shipment or a flawed bolt gets caught, while there is still time to reorder.
5. Understand the clock. Production lead time typically starts when the fabric lands and is approved, not when the order is placed. A twelve week lead time on a piece whose COM ships in week six is a twelve week clock that begins in week six.

That last point is the one that costs designers the most and is mentioned the least. If your install date is fixed, work backward from it through fabric lead time as well as production lead time.

What to put in writing

A COM specification that will not generate a phone call includes: the piece and finish; the fabric manufacturer, pattern name, and colorway; the width and repeat; the direction (railroaded or up the roll); the confirmed yardage; the ship to address; and the sidemark. Everything else can be negotiated later. These cannot.

The larger point

COM exists because the alternative, specifying only from a maker's in house library, puts a ceiling on what a room can be. Designers accept the coordination burden because the result is a piece that exists only in that interior, in that textile, at that scale.

The burden is manageable when the maker treats specification as part of the product rather than as paperwork. Ask your workroom for yardage against your actual fabric. Ask when the production clock starts. Ask what they do when a bolt arrives short. The answers tell you a great deal about how the rest of the order will go.

Olivya Stone is a furniture line for the trade. Pieces are specified as shown from the collection, in COM or COL, with custom dimensions and finishes available on request. [Apply for trade access](/trade-program) to see pricing, yardage requirements, and current lead times.