When it comes to finding the perfect suit, understanding mens suit coat sizes is crucial. A well-fitting suit coat can elevate your look, exude confidence, and make you feel comfortable. In this guide, we'll delve into the world of suit coat sizing, helping you find the perfect fit.
Understanding Suit Coat Sizing
Suit coat sizing can be a bit confusing, as it's not as straightforward as shirt sizing. Instead of small, medium, or large, suit coats use a combination of numerical and alphabetical sizing. This system accounts for both chest and waist measurements.
Chest Measurement
The first number in a suit coat size represents the chest measurement. This is typically taken at the fullest part of the chest, usually about an inch below the armpits. For example, in a size 40R, the '40' refers to a chest measurement of approximately 40 inches.
Waist Measurement
The second number, if present, represents the waist measurement. This is taken at the natural waistline, usually about an inch above the navel. For instance, in a size 40R, the 'R' refers to a waist measurement of approximately 30 inches. The most common waist sizes are R (30 inches), S (32 inches), and T (34 inches).
How to Measure for a Suit Coat
Before you head to the store or browse online, it's essential to take your measurements. Here's a simple guide:
- Wear a fitted shirt or t-shirt while measuring.
- Using a flexible measuring tape, measure around the fullest part of your chest, keeping the tape parallel to the ground.
- Measure around your natural waistline, keeping the tape parallel to the ground and the starting point at the middle of your back.
Once you have your measurements, you can use the size chart below to find your suit coat size.

Mens Suit Coat Size Chart
| Chest Size (inches) | Waist Size (inches) | Suit Coat Size |
|---|---|---|
| 36-38 | 28-30 | 36R, 38R |
| 38-40 | 30-32 | 40R, 40S |
| 40-42 | 32-34 | 42R, 42S, 42T |
| 42-44 | 34-36 | 44R, 44S, 44T |
| 44-46 | 36-38 | 46R, 46S, 46T |
| 46-48 | 38-40 | 48R, 48S, 48T |
Remember, these are general guidelines. Different brands may have slightly different sizing, so it's always a good idea to check the specific brand's size chart.
Finding the Perfect Fit
Once you have your size, it's time to try on the suit coat. Here are some tips to ensure the perfect fit:
- The shoulder seams should sit at the outer edge of your shoulders, not too tight or too loose.
- The sleeve should end at the break of your wrist, not too long or too short.
- The coat should fit snugly around your chest and waist, but not be too tight. You should be able to fit a flat hand between your chest and the coat.
- The bottom of the coat should cover your seat, but not be too long. It should end around the base of your thumb when your arms are at your sides.
If you're between sizes, it's generally better to size up and have the coat tailored. A well-fitting suit coat can make all the difference in your overall appearance and comfort.