Size & Fit Guide

A good fit starts with the right measurements. Use this guide to prepare for choosing a size, then check the options and fit notes on the product you want.

Start with a piece that fits

Have a jacket, pair of trousers, or shirt you already like nearby. Note its brand, size, and what you would change about the fit. Sizes can differ between styles, so use that label as a starting point.

How to measure

Use a flexible tape and keep it snug without pulling it tight. Record whether you are using inches or centimetres. A second person can help keep the tape level.

• Chest: Measure around the fullest part of your chest, under your arms, with your arms relaxed.
• Waist: Measure around your body where you wear your trousers. A labelled trouser size and your body measurement may differ.
• Inseam: Lay a well-fitting pair of trousers flat and measure along the inside seam from the crotch to the hem. Tell us this is a garment measurement.
• Neck: Measure around the base of your neck where a shirt collar sits, without tightening the tape.

Suits, blazers & tuxedo jackets

Check both the size and any length option shown on the product page. Short, Regular, and Long describe length options; they are not interchangeable fit categories. Availability varies by style.

For a suit, confirm the included trouser size before ordering if you need a different waist size. Do not assume every suit has the same jacket-to-trouser sizing or that pieces can be mixed.

Trousers & shirts

For trousers, compare the waist and fit notes, and check whether hemming is needed. If a two-part size label is unclear, send us the product link so we can confirm it before you order.

For shirts, use the sizing format shown on that specific style. A letter size in one shirt is not a guaranteed match for another cut.

Between sizes?

Stretch helps you move, but it does not replace the right fit. Avoid sizing down just because a fabric stretches. When trying a garment on, sit, reach forward, and check for pulling at the buttons, shoulders, waist, and seat.

Get help choosing

Contact Flex Tailor with the product link, your usual size, height, chest and waist measurements, and preferred fit. Include your inseam for trousers and your measurement units. We can help you check the options for that style.

Need a different fit after delivery? Read our return and exchange policy before sending anything back.