If you like a sweatshirt with room, size up on the Comfort Colors 1566. If you like it close, take your usual size. That is the whole answer. The rest of this page is why.

The numbers
Inches, laid flat, from the manufacturer’s chart. Allow about 1 inch.
| Size | S | M | L | XL | 2XL | 3XL |
|---|---|---|---|---|---|---|
| Width | 21 | 23 | 25 | 26.5 | 28 | 29.5 |
| Length | 27.5 | 28.5 | 29.5 | 30.5 | 31.5 | 32.5 |
| Sleeve | 31.5 | 33.5 | 35.3 | 36.8 | 38.3 | 39.3 |
Why people size up
- It is already a relaxed cut. A medium is 23 inches across, about 3 inches wider than a medium tee.
- Garment-dyed fleece can tighten a little after the first wash, even when washed cold. Sizing up leaves room for that.
- People wear crewnecks over other things. A tee underneath eats an inch.
Why some people should not
The sleeves are long. If you are shorter than about 5 feet 5 inches, sizing up puts the cuff over your knuckles. In that case take your usual size and wash it cold, and it will settle where you want it.
The sleeve number, explained
“Sleeve length” on this chart is measured from the center of the back collar, along the shoulder, to the cuff. It is not the underarm seam. That is why the numbers look long.
Compare it with the tee on the Size guide, or go straight to the crewneck.