How to Measure for a Suit

Finding the right suit size starts with a few simple measurements. A well-fitted suit not only looks better but also feels more comfortable and confident to wear.

This guide shows you exactly how to measure yourself at home in just a few minutes, so you can choose the right size with confidence.

What You’ll Need

Before you start:

A soft measuring tape
A mirror (or someone to help)
A t-shirt or light clothing

👉 Always measure standing naturally — don’t suck in your stomach or puff out your chest, as this can affect accuracy

Step 1: Measure Your Chest

Your chest measurement determines your jacket size.

How to measure:

Stand upright with arms relaxed
Wrap the tape around the fullest part of your chest
Keep the tape level across your back
Make sure it’s snug but not tight

👉 This is the most important measurement when choosing a suit

Step 2: Measure Your Waist & Inside Leg

Your waist measurement determines your trouser size.

How to measure:

Measure around your natural waistline (just above your hips)
Keep the tape comfortable — not tight
Breathe normally while measuring.
Inside leg , hold tape at the top of crotch down to just under the ankle bone.

👉 Suit trousers typically sit higher than jeans for a cleaner look

Step 3: Choose Your Height (Jacket Length)

Your height determines your suit length:

Under 170 cm → Short (S)
170 – 183 cm → Regular (R)
Over 183 cm → Long (L)

Example sizes:

100R → 100 cm chest, regular height
104L → 104 cm chest, tall fit
96S → 96 cm chest, shorter fit

Optional Measurements (For a More Precise Fit)

While chest and waist are the most important, additional measurements can improve fit:

Sleeve length
Inside leg (trouser length)
Jacket length

Most retailers confirm that chest, waist, and inside leg are the core measurements for suit sizing

Tips for Accurate Measurements

For best results:

Measure in light clothing or a t-shirt
Keep the tape level and straight
Measure twice to confirm
Ask someone to help if possible

Even small differences in measurement can affect how a suit fits and feels

Common Sizing Tip

👉 If you are between sizes, it’s usually better to go slightly larger and tailor down.

A suit that is too tight is harder to adjust, while a slightly larger suit can be refined for a perfect fit.

Find Your Perfect Fit at Harrys for Menswear

At Harrys for Menswear, we make it easy to find the right suit size with confidence.

Whether you're shopping for:

Our range is designed to provide comfort, style, and a reliable fit.

👉 Browse our Men’s Suit Collection to find your perfect suit

How to Measure for a Suit | Men's Suit Size Guide Australia