Baseball Uniform Size Chart: Youth and Adult Jerseys, Pants and Socks
Updated 2026-10-17
Measurement charts for youth and adult baseball jerseys, pants and socks, with how to measure a player and how to size a whole roster without trying anything on.
How to measure
You need two numbers per player: chest and waist. Chest is measured around the fullest part with the arms relaxed, over a t-shirt. Waist is measured where the pants sit, usually just above the hip bone. A soft tape takes ten seconds per player; a coach can do a whole roster during warm-ups. If a player is between sizes, go up. Jerseys are meant to sit loose, and kids grow mid-season.
- A soft tape measure, not a metal one
- Measure over a t-shirt, not a hoodie
- Write chest and waist next to each player's name
- Round up when a number falls between sizes
Youth jerseys
| Size | Chest | Body length | Typical age |
|---|---|---|---|
| YS | 26–28 in | 20 in | 6–7 |
| YM | 28–30 in | 22 in | 8–9 |
| YL | 30–32 in | 24 in | 10–11 |
| YXL | 32–34 in | 26 in | 12–13 |
Adult jerseys
Women's-pattern jerseys use the same chest ranges one size down: a women's M fits a 36–38 inch chest with a shorter body. Mark "women's cut" in the order notes.
| Size | Chest | Body length |
|---|---|---|
| S | 36–38 in | 28 in |
| M | 39–41 in | 29 in |
| L | 42–44 in | 30 in |
| XL | 45–47 in | 31 in |
| 2XL | 48–50 in | 32 in |
| 3XL | 51–53 in | 33 in |
| 4XL | 54–56 in | 34 in |
Pants
Knickers end 2 inches below the knee regardless of size. Open-bottom pants are cut 2 inches longer than full-length so they break over the shoe.
| Size | Waist | Inseam (full length) |
|---|---|---|
| YS | 22–24 in | 20 in |
| YM | 24–26 in | 22 in |
| YL | 26–28 in | 24 in |
| YXL | 28–30 in | 26 in |
| S | 28–30 in | 29 in |
| M | 31–33 in | 30 in |
| L | 34–36 in | 31 in |
| XL | 37–39 in | 32 in |
| 2XL | 40–42 in | 33 in |
| 3XL | 43–45 in | 34 in |
Socks
Socks are knee-high and sized by shoe size. Players between sizes take the larger one.
| Sock size | Shoe size (US) |
|---|---|
| Youth | 13Y–4 |
| Adult M | 4–8 |
| Adult L | 8–12 |
| Adult XL | 12–15 |
Sizing a roster fast
If the team has not been measured, a reasonable default for 12U is YL/YXL jerseys and YL pants, and for adult rec it is L jerseys and M/L pants, adjusted for the players you know. For set pricing see the custom baseball uniforms page.
- Collect chest and waist for each player on one sheet.
- Assign jersey sizes from the chest chart, going up on ties.
- Assign pant sizes from the waist chart; check inseam only for very tall or short players.
- Add two spare jerseys per team in the two most common sizes.
- Send the sheet with the order; we check it against the proof and flag anything odd.
Related questions
How do I measure a player for a jersey?
Around the fullest part of the chest, arms relaxed, over a t-shirt. Compare to the chart and go up if between sizes.
Do your jerseys run true to size?
Yes, with a relaxed athletic fit. Players who like a baggy fit go one size up.
What size is a youth XL compared to adult?
A YXL chest (32–34 in) is just under an adult S (36–38 in) with a shorter body. Big 13-year-olds often move to adult S.
How do pants sizes work?
By waist. Youth YS–YXL cover 22–30 inch waists; adult S–3XL cover 28–45 inches.
What is the difference between knickers, full-length and open-bottom?
Knickers end below the knee. Full-length reach the shoe. Open-bottom are cut longer and break over the shoe.
Can we change sizes after ordering?
Up until you approve the proof. After approval the sizes are cut, so check the roster on the proof.
Do you make women's sizes?
Yes, on a women's pattern in XS–3XL. Note it on the order.
What sock size should a youth team order?
Youth fits shoe sizes 13Y–4; most players 12 and under wear it.
Should we order spares?
Two per team in the most common sizes. Reorders have a 10-piece minimum, so spares are cheaper than a reorder for one player.
Can jersey and pant sizes differ for one player?
Yes. Each is sized separately.
