Sizing Apps - Tweedmaker

Standard Size Fit Calculator

After many years of trial and error, our expert tailors have perfected the way we can make sure every gent gets the best fitting suit of you life. Use the 3 calculators below to find your perfect fit combination. And as always, you can still send us your sizes after purchase and we will be here to recommend the best combination of sizes just for you. Please note: standard sizes are UK/USA sizing. If you have any questions please contact Tonya at

Jacket Size

Vest Size

Pants Size

Note: If your belly measures the same as or larger than your chest, our calculator will always recommend a larger jacket & waistcoat size to accommodate the belly. In the case where the belly measures larger than the chest, custom tailoring is often the best option unless you expect a downward fluctuation of the belly size.  See below for detailed measurement instructions.

Measuring For Our Fit Calculators


Your chest size is determined by measuring around the widest part of your chest. This is typically just below your armpits and just above your nipples. Remember to breathe normally, you don't want to hold your breath, otherwise you will be squeezing into the suit. Make sure that the tape measure is snug, but not too tight against your chest and do not overextend the chest.


Your belly measurement helps us fit the best suit to you, in combination with your chest our team can ensure your suit is spot on. Your belly is measured over your navel.

Note: If your belly measures larger than your chest, we will always recommend a larger size to accomodate the belly.  Where the belly is larger than the chest, custom tailoring is often the best option. 


Measure the waist perimeter below the navel and at the height you wear your suit pants. This will normally be at 4 fingers below the navel unless belly is larger. Don’t use jeans as a reference,since they usually sit lower than suit pants.

Important: this measurement will not equal to your normal pants size -do not be surprised that it is larger.


Measure around the widest part of hip,ensuring there is room for one finger behind the tape; the tape should be level and not too tight.


Measure an already well fitting pair of trousers from the crotch seam down to the end of the leg hem.

Sizing Options

No matter which sizing option you have chosen to use for your new suit, both have the same attention to detail and care that can only come with a hand made suit. 

Standard Sizing

Standard sizing is similar to your normal suit size, for example a 42R. However we wanted to make sure that every gentleman that orders a new suit from us is happy with not only the quality and look of the suit but also the fit. 

So we now give you the option of selecting your preferred size when you place your order, or alternatively,  you can purchase your standard sized suit without sizing and our sizing team will help you select the best sizes for a perfect fit. 

This option is perfect for weddings and customers looking to fit out a number of gents with a new suit. If the fit is not quite right, no problem you can send it back to us within 30 days for a refund or we can adjust a size or two and have it made again. For standard sizes we take 6 measurements and help work out the best fitting suit for you.

Custom Sizing

Cut from the ground up, our fully custom suits are the pinnacle of fit and comfort. We take a whole bunch of measurements and our tailor start from scratch to ensure the best fit for you. These finely tailored hand crafted require a bunch of extra additional measurements, but don't worry they are just as easy to take as the standard measurements. This option is great for gents who seem to find it difficult to fit a standard size suit.

We really go the extra mile here, and look at 15 different measurements to ensure you get the perfect fitting custom made to measure suit that will last you for years to come. Because these suits are tailored to you our custom suits are not returnable, it rarely happens but if there was a tailor error we will 100% work with you to repair,  return or replace the suit.