| Abbreviation | Definition |
|---|---|
| XS | Xtra Short |
| XXH | eXtra eXtra Heavy |
| XXL | Extra Extra Large |
| XXS | eXtra eXtra Small |
| XXW | Extra Extra Wide |
| XXXL | Extra Extra Extra Large |
| XXXXL | Extra Extra Extra Extra Large |
| XXXXXL | Extra Extra Extra Extra Extra Large |
| XXXXXXL | Extra Extra Extra Extra Extra Extra Large |
| XXXXXXXL | Extra Extra Extra Extra Extra Extra Extra Large |
| YBT | Young Boss Team |
| YCC | Your Crappy Closet |
| YFC | Youngbloods First Class |
| YJ | Yellow Jersey |
| YL | Young Ladies |
| YL | Youth Large |
| YM | Youth Medium |
| YO | Yarn Over |
| YRV | Youth Rib Vest |
| YSL | Yves Saint Laurent |