Sizing questions make up nearly half the messages our support desk gets, and almost all of them come from the same misunderstanding: treating “medium” as a universal constant. It isn't. Each league's kit was engineered for a different body, a different climate and a different sport — and the fan versions inherit all of it.
Why does a medium fit differently in every league?
Because the athletes' versions do. A football jersey was designed around armor; a soccer shirt around a sprinter's torso at full sprint; a hockey sweater around base layers in a cold rink. When you buy the fan edition, you buy that DNA. Here is how each league's cut actually behaves on a regular human:
| League | Cut profile | Real-world advice |
|---|---|---|
| NFL | Boxy through the chest and shoulders, built for pads | True to size for the classic look; size down one for a streetwear fit |
| NBA | Long and loose with a swingman drape | True to size; tall-friendly, generous length |
| MLB | Button-up, athletic but straight | True to size; roomy enough to layer a tee under |
| NHL | Roomy everywhere, assumes a hoodie underneath | Size down one if wearing solo in warm weather |
| NCAA | Varies by program template (football vs hoops vs baseball) | Check the product chart — do not assume your other college size |
| Soccer | Slim European athletic cut, tapered waist | Size up one for a US casual fit — the #1 adjustment we recommend |
How do you measure a jersey you already own?
The single most reliable sizing method needs no size chart at all — just a jersey you love and a tape measure. Lay it flat and take three numbers:
- Pit to pit — straight across the chest, armpit seam to armpit seam. This is the number that decides fit.
- Length — from the highest point of the collar to the hem.
- Shoulder — seam to seam across the back.
Then compare those numbers — not the letter on the tag — against the measurements in our six-league size guide. A two-inch difference in pit-to-pit is a full size in most leagues.
Which leagues should you size up in — and which size down?
If you only remember three rules from this guide, make them these:
- Size UP in soccer. The athletic European block runs one step slim for US buyers. When in doubt, up.
- Size DOWN in hockey (worn solo). The cut assumes layers. No hoodie, no need for the extra room.
- Stay TRUE in football, basketball and baseball — these are cut for the stands already, and the drape is part of the look.
Frequently asked questions
I'm between sizes — which way should I go?
It depends on the league, not your gut. Soccer: size up, the European athletic cut forgives nothing. Hockey: size down if you will wear it solo. Football, baseball and basketball: go bigger — a jersey is outerwear, and the extra half inch reads as drape, not sloppiness.
Do soccer jerseys really run small for US buyers?
Yes — this is the single most common sizing surprise in the vault. Club replicas are cut on a European athletic block, one full step slimmer than a US tee. If you usually wear a US medium and want a relaxed fit, order the large. If you want the player look, stay true.
Do women's and youth jerseys follow the same charts?
No — women's cuts are shaped, not just smaller, and youth sizes run on age bands that vary by league. Always use the specific chart on the size guide page for the cut you are buying, not the adult men's chart.
What if the jersey doesn't fit when it arrives?
Swap it. Every FKV order carries 30-day free returns and exchanges, and size swaps are the most common — and most welcome — request we handle. Keep the tags on, don't wash it, and start the exchange from our returns page.
Do custom name-and-number jerseys fit the same as blanks?
Yes — customization happens on the same base garment, so the size chart applies identically. The only difference is planning: custom work adds 3–7 working days before dispatch, so order a size you are sure of and order early for gift deadlines.
Will my jersey shrink in the wash?
Performance polyester barely shrinks — but heat destroys namesets and numbers long before the fabric changes size. Cold wash, inside out, air dry. Our jersey care guide has the full routine plus a stain playbook.
Get the size right the first time
Full US, EU & UK charts for all six leagues, plus pit-to-pit measurements — and a 30-day free size exchange if you still want to swap.
Open the Size GuideSee the Three Price Tiers
