Sizing Guide: How AI Promo Design Tees, Hoodies, Polos, and Long Sleeves Fit
How our tees, hoodies, polos and long sleeves actually fit, how to pick between two sizes, and how youth and adult sizes line up for mixed orders.
The exact garment measurements, in inches, are on each garment's own page - start from Products. But bodies vary more than a chart admits, so here is what actually matters, from printing on all eleven garments: how each fits, how to break a tie between two sizes, and how youth and adult sizing relate when going in the same order. Part of Custom Apparel Guides & How-Tos.
The general rule
Most of the eleven garments run true to size with a little extra room through the body - comfortable, everyday blanks, not a snug athletic cut. Two are the exception: the polo, cut trimmer through the shoulders and chest, and the women's tee, which is semi-fitted.
Fit by garment
| Garment | How it fits |
|---|---|
| Adult Tee (heavyweight cotton tee) | True to size, a little roomy through the body. |
| Youth Tee | Same fit as the adult tee, scaled down. |
| Adult Hoodie (heavy blend hoodie) | True to size, plus the extra bulk of hoodie fabric - factor that in if it is going over another layer. |
| Youth Hoodie | Mirrors the adult hoodie, just smaller; works well over a long-sleeve shirt. |
| Adult Crewneck (heavy blend crewneck) | The same fleece as the hoodie without the hood. True to size, roomy through the body, and easier to layer a jacket over than a hood is. |
| Youth Crewneck | Mirrors the adult crewneck, scaled down, and runs youth XS-XL. |
| Adult Polo | Trims closer through the shoulders than anything else here. If you are active in it - coaching, teaching, working a table - and you are between sizes, size up. |
| Adult Long Sleeve | Fits like the adult tee with sleeves added: true to size, a little roomy, room to layer under a hoodie. |
| Women's Tee | The adult tee's cotton, cut semi-fitted: shaped through the body, with cap sleeves. Size up for the looser fit of the unisex tee. |
| Performance Tee | Cut roomy for moving in, and runs true to size. Light polyester, so it layers under a hoodie without bulk. |
| Youth Performance Tee | Youth XS-XL, which the maker maps to a youth 4 (XS) through an 18/20 (XL). Size by the chart, not by age. |
Stuck between two sizes?
- Want a closer, tailored look? Order your usual size.
- Want room to layer, or just do not like a snug fit? Size up - especially on the polo, where the shoulder cut makes the biggest difference.
- Ordering for a group? Roomier is the safer default: a loose shirt still gets worn; one that is tight across the shoulders often does not.
Mixing youth and adult sizes
Youth and adult are not one continuous scale - a youth extra-large is not "one size below adult small," it is a smaller garment built for a smaller frame.
For an order spanning younger kids and older teens or adults, do not default a growing kid into youth just because of age; if borderline, an adult small often fits longer and matches the group's cut better. Youth and adult items ship together in one order either way, so size by fit, not by age. The side-by-side measurements, and the price and print-area differences between the two, are in youth XL vs adult small.
Before you check out
Since custom prints are not returnable for a size ordered in error, it is worth a minute here before you check out. See every size and price on Products, or read how sizing works for a full class order on Custom School Shirts.