Blazer Size Chart
Men's blazers use the same chest number as suits (40R ≈ 40 in / 102 cm chest, Regular length). Women's blazers use letter or numeric sizes—match bust first. Soft-shoulder coats often feel roomier at the same men's label.
Quick answer
- Men: start with your suit jacket number + S/R/L from height.
- Women: measure bust; use XS–XXL or US numeric on the brand chart.
- Shoulders and button pull matter more than matching a dress size alone.
Men's blazer / jacket
Same grid as our suit size chart. Add S, R, or L from height after you pick the number. EU ≈ US + 10.
| US | EU | Letter | Chest |
|---|---|---|---|
| 34 | 44 | XS | 34 in (86 cm) |
| 36 | 46 | S | 36 in (91 cm) |
| 38 | 48 | S/M | 38 in (97 cm) |
| 40 | 50 | M | 40 in (102 cm) |
| 42 | 52 | L | 42 in (107 cm) |
| 44 | 54 | L/XL | 44 in (112 cm) |
| 46 | 56 | XL | 46 in (117 cm) |
| 48 | 58 | XXL | 48 in (122 cm) |
| 50 | 60 | XXL/3XL | 50 in (127 cm) |
| 52 | 62 | 3XL | 52 in (132 cm) |
Women's blazer
Approximate bust ranges for letter sizes. Cropped, petite, tall, and oversized cuts shift fit—use the product size chart when shopping. Cross-check the women's size chart.
| Letter | US numeric | Bust |
|---|---|---|
| XS | 0–2 | 31–33 in (79–84 cm) |
| S | 4–6 | 34–35 in (86–89 cm) |
| M | 8–10 | 36–37 in (91–94 cm) |
| L | 12–14 | 38–40 in (97–102 cm) |
| XL | 16–18 | 41–43 in (104–109 cm) |
| XXL | 20–22 | 44–46 in (112–117 cm) |
Fit checks (any blazer)
- Shoulder seam sits at the edge of your shoulder bone—no overhang, no pulling.
- Collar lies flat on your shirt with no gap at the back of the neck.
- About 0.5 in (1–1.5 cm) of shirt cuff shows below the sleeve.
- You can slide a flat hand between your chest and a buttoned jacket without strain.
- Jacket hem covers the seat and falls near mid-crotch with arms relaxed.
- Women: reach forward—armholes should not dig when you move.
Blazer vs suit jacket sizing
For men in US stores, blazer and sport-coat numbers usually follow the same chest-inch system as suits (40R, 42L). Unstructured or soft-shoulder blazers often feel roomier at the same label than a structured suit jacket.
Women's blazers are different: letter sizes (XS–XXL) or US numeric sizes by bust—not the men's 40R system. Always measure bust at the fullest point and check the brand chart for cropped or oversized styles.
If you already know your suit size, start there for a men's blazer, then check shoulders and button stance on the specific cut.
Fit notes by blazer type
| Model / line | Typical fit | What to try |
|---|---|---|
| Structured suit jacket | Closer to chest chart; padded or canvassed shoulder | Prioritize shoulder seam; chest ease about 2–3 in |
| Unstructured blazer | Softer shoulder; may wear same number with more room | If it balloons, try slim cut before sizing down |
| Sport coat | Often slightly easier through the chest | Still use measured chest; do not jump two sizes |
| Women's tailored blazer | Bust and shoulder drive the size | Between letters, size up if you wear layers |
| Oversized / boyfriend cut | Intentionally roomy—chart is a floor, not a target | Match bust for length/shoulder, then pick the look |
Quick fit checks for any blazer
- Shoulder seam at the bone.
- Button closed without X-pull across the chest.
- Sleeves show a bit of shirt cuff when you wear a dress shirt.
- For women: check armhole comfort when reaching forward—not only bust.
Blazer sizing pitfalls
Avoid: Using dress size alone for a women's blazer.
Instead: Measure bust (and shoulder if the brand lists it). Cross-check the [women size chart](/guides/women-size-chart).
Avoid: Assuming a European blazer number equals US chest inches.
Instead: Convert with [US to EU suit size](/convert/us-to-eu-suit-size) or match cm on the hangtag.
Related
Frequently asked questions
Is blazer size the same as suit size?
For men, yes in most US stores: the jacket number is still chest inches (40) plus S/R/L. Sport coats and unstructured blazers can fit roomier than a matching suit jacket at the same label.
How do women's blazer sizes work?
Women's blazers often use letter sizes (S, M, L) or US numeric sizes. Measure bust at the fullest point and match the brand chart—our table is a starting range only.
Should a blazer button without pulling?
Yes. If the front pulls or the lapels gape, try the next chest size up. Shoulder seams should sit at the shoulder bone.
Do I need Short / Regular / Long on a blazer?
When the brand offers S/R/L, use the same height bands as suits. Many casual blazers ship one length—check sleeve and hem on the product page.
More questions
- Can I wear a suit jacket size for a casual blazer?
- Usually yes for men's US sizes. Try the same number first; unstructured blazers may feel looser. If shoulders gap, go down only if the chest still closes cleanly.
- What women's blazer size is medium?
- Often US 8–10 with bust around 36–37 in (91–94 cm) on our starting chart. Brands vary—use the product size table.