UK Suit Size 36–48: How to Measure Your Chest and Choose the Right Fit

UK suit sizes such as 36, 38 and 40 refer to the chest measurement in inches. The number gives you a starting point, not permission to ignore the rest of the fit. Your shoulder line, sleeve length, waistcoat and trousers still need to work together.

Measure your chest

Stand in a relaxed posture and wear the shirt you expect to wear under the suit. Place a soft tape around the fullest part of your chest, under the arms and across the shoulder blades. Keep the tape level and firm without pulling it tight. Take the reading at a normal breath.

If the measurement sits between two sizes, compare the product’s cut and the fit you prefer. A slim-fit jacket should feel close through the chest, but the lapels should lie flat and the front should not strain when you fasten it.

Check the jacket in a mirror

• The shoulder seam should finish close to the edge of your shoulder.
• The collar should sit against the shirt collar without a gap.
• The sleeve should show a small amount of shirt cuff.
• The button should close without pulling or forming a sharp X-shaped crease.

Do not overlook the trousers

A good jacket can still look wrong when the trouser break sits too high or too low. Several BG Suiting men’s wool suit descriptions include a longer trouser length for customer customisation. That option helps taller customers and anyone whose inside leg needs more length than the standard cut provides.

Open the BG Suiting size and fit guide alongside the product page. The Men’s Classic 3-Piece Wool Suit and other men’s collections list UK chest sizes 36–48 so you can compare the available options before adding a size to your basket.

Order with a fitting check in mind

Men’s suit collections show an estimated UK delivery window of four to seven working days. Leave time to try the complete outfit and arrange any alteration you need. Read the returns and delivery details before ordering.