How to measure a shirt's neck size
Lay your shirt on its back and open the collar. Make
sure the collar is flat and straight. Measure from middle of
the button (you can see the knot from the button) to the far
end of the button hole. Measure as accurately as you can.
This shirt has a neck size of 16.25 inches.
How to measure a shirt's sleeve length
Flip your shirt over so it's laying on its front. Make sure
it's unbuttoned. Straighten out one of the arms and make sure
it's a little tight, but not stretched. Start at the very
center of the collar where it joins the back of the shirt.
Measure all the way to the end of the sleeve in a straight line.
This shirt has a sleeve length of 36.3 inches.
How to measure a shirt's shoulder width
Now, button up your shirt and lay it on its front again.
Measure straight across from shoulder seam to the other. The
piece of fabric at the top of a shirt's back is call a 'yoke'.
This is what you're measuring.
This shirt has a shoulder width of 19.5 inches.
How to measure a shirt's length
While the shirt is still face-down, measure from the center of
the collar where it connects to the back of the shirt (the
same place as you started measuring the sleeve length) to the
bottom center of the shirt.
This shirt's length is 32.0 inches.
How to measure a shirt's chest width
Next, flip your shirt over so it's on its back. Smooth out
the shirt so it's perfectly flat. Measure carefully from the
bottom of one armpit to the bottom of the other armpit.
This shirt's chest width is 24.5 inches.
How to measure a shirt's stomach width
Your shirt should still be laying flat on its back. Just for
good measure, smooth it out again. Measure across the
narrowest part of the shirt. This should be around where it
would go over your belly button. Make sure you measure
straight across and not slightly up or down.
This shirt's stomach width is 22.88 inches.
How to measure a shirt's sleeve width
Lay the shirt out flat. Pull out one arm so it's also flat
and the bottom is folded right along the seam. Start about an
inch from the bottom of the armpit and measure across the
sleeve. Your measuring tape should be at a right angle to the
top of the sleeve.
This shirt's sleeve width is 9.19 inches.
How to measure a shirt's cuff
Measuring the cuff is just like the neck, just on a smaller
scale. Find the middle of the button (if there are two, use
the outside one) and measure across to the outside of the
button hole stitching.
This shirt's cuff is 9.8 inches.
That's it! You're done!
Please use inches.