A box of 12 skeins in a single color — 105 yards of floss in total, at 8.75 yards each. Same thread as our single skeins: 100% Egyptian long-staple cotton, six-strand divisible, double mercerized.

Buying a box makes sense when one color carries a project. Large fills eat floss faster than people expect, and running out midway means hunting for a matching dye lot. Twelve skeins bought together avoids that entirely.

It's also how teachers, camps, and craft groups buy — one box covers a room. Fully colorfast and fade resistant, so finished pieces keep their color.