How to measure a t-shirt in 7 simple steps
(this guide has been repurposed from printful.com)
Most brands publish product specs using measurements lying flat. Others use full circumference for the chest/width. Be sure which measurement your t-shirt is using. Place the shirt flat, smooth it, and don’t stretch any part of the fabric before you start.
Step 1: The flat-surface rule
Start with the t-shirt laying flat on a clean surface. Make sure the front and back panels sit naturally – no twist in the side seams, no pull at the collar or hem. If the shirt bunches near the armpit or sleeve, smooth it with your hand.
This part sounds minor. It’s not. Bad setup ruins good data. Taking measurements accurately starts with the shirt fully laying flat: you can’t accurately measure the waist, shoulders, neck, sleeve, collar, and armpits any other way.
If you pull the body or force the sleeve opening into place, your numbers drift.
Keep the shirt relaxed and square before you measure anything.
Step 2: Length (high point shoulder to hem)
Source: Printful
Shirt length is the distance from the highest point of the shoulder to the bottom hem. How do you measure the length of a shirt? Place the tape measure at the highest point where the one shoulder meets the collar. Measure straight down to the bottom hem in inches or centimeters.
Keep the tape measure vertical – don’t follow a side curve, don’t start from the front neck. Same shoulder point, every time.
Step 3: Chest width (the armpit-to-armpit measurement)
Source: Printful
Next, measure chest width. Place the measuring tape across the front of the shirt, about one inch below the armpit, from one side to the other side. Keep the line straight.
This is the pit-to-pit measurement – it shows flat width, not full chest circumference. To estimate the circumference, the flat number generally doubles. So a 22-inch chest width is roughly 44 inches around the chest.
Step 4: Sleeve length (shoulder seam vs center back)
Source: Printful
For standard tees, start at the shoulder seam and measure along the top of the sleeve to the end of the cuff or sleeve opening. That’s your basic sleeve length for tees and dress shirts alike.
Some manufacturers measure center-back sleeve length instead. Start at the back center of the neck, run the tape across one shoulder, and continue down the sleeve to the cuff.
Step 5: Shoulder width (seam-to-seam)
Source: Printful
To measure shoulder width, flip the shirt over and find the back shoulder seams. Then measure from one seam to the other, keeping the line straight across the upper back.
This tells how the shirt will actually sit on the body:
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A narrower shoulder looks more fitted
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A broader shoulder feels more relaxed and roomy
Step 6: Waist and hem measurements
Source: Printful
Still lying flat, measure waist width across the entire waist area – usually around the narrowest part of the torso. Then measure the hem across the bottom opening, from one side seam to the other.
This number helps explain taper. A straight-cut tee shows almost no change between chest width, waist width, and hem. More shaped shirts narrow at the waist and open slightly again near the bottom hem.
Keep the shirt flat. Keep the tape straight. And if the side seam pulls inward, smooth it before you read the number.
Step 7: Sleeve cuff and opening
Source: Printful
Finally, measure the cuff or sleeve opening from one edge to the other. Don’t wrap the tape around the opening. Keep it flat and measure across.
This number affects comfort. A tighter opening can feel restrictive on larger arms (or wrists if it’s a long-sleeve). A wider opening gives a more relaxed fit. In oversized styles, the cuff often enhances the overall silhouette.
Measurements for every shirt and brand vary slightly.