Fat Quarters, Jelly Rolls and Precuts: Quilt Fabric 101
The precut wall at a quilt shop has its own vocabulary, and all of it is just fabric cut into friendly shapes. Here's the decoder.
Walk past the bolts in any quilt shop and you'll hit a wall of bundles with bakery names: jelly rolls, layer cakes, charm packs. None of it is complicated. Precuts are just quilting cotton cut into standard shapes and bundled from one coordinated fabric collection, so everything matches without you doing the matching.
The decoder
| Name | Size | Good for |
|---|---|---|
| Fat quarter | ~18" x 21" | The universal unit; blocks, small projects, stash building |
| Fat eighth | ~9" x 21" | Scrappy blocks, applique |
| Jelly roll | 40ish strips, 2.5" x WOF | Strip quilts, bindings, fast tops |
| Charm pack | 42ish squares, 5" x 5" | Patchwork with zero cutting |
| Layer cake | 42ish squares, 10" x 10" | Bigger blocks, quick throws |
| Honey bun | Strips, 1.5" x WOF | Fine piecing, string blocks |
The star is the fat quarter: a half yard of fabric cut in half the other way, giving you a squarish 18" x 21" piece instead of a skinny 9" x 42" ribbon. Same fabric, better shape; you can cut a 10" block from a fat quarter that a standard quarter yard physically cannot yield.
Why quilters love them (and the two catches)
Precuts solve the two expensive problems of quilting: buying coordinated fabric and cutting it accurately. A jelly roll is a whole collection, pre-coordinated by the designer, already in strips. For beginners that's a shortcut past the most error-prone step, which is why my first-quilt guide starts from precuts on purpose.
Catch one: the pinked edges on precuts shed, and prewashing small pieces tangles them into lint mittens, so most quilters sew precuts unwashed and wash the finished quilt. Catch two: per yard of actual fabric, precuts cost more than yardage. You're paying the shop's scissors, which is fair, but know it.
Related vocabulary you'll hear at the same wall: batiks (dyed-through prints that precut beautifully) and WOF, width of fabric, the assumed ~42" length of every strip.
What to bring and what to ask
Bring: nothing but restraint, honestly; the precut wall is where quilting budgets go to die happily. Ask: "Is this collection also on the bolt?" (so you can grab matching yardage for borders and backing while it exists), and "Do you have a pattern that uses exactly one jelly roll?" Every quilt shop keeps a shelf of one-precut patterns, and a first shop visit that leaves with one bundle and one matching pattern is a visit done exactly right.