William Mahoney Premium Dress Shirt


Say hello to our executive line, by William Mahoney. The premium cotton fabric is soft, light and has a hint of stretch for comfort. Plus it’s easy care- just machine wash cold and tumble dry low and it won’t shrink or wrinkle (remove promptly from dryer). You’re going to look and feel amazing in this shirt. Quick size guide (William Mahoney uses numbered sizing but correlates well with ours):

Height Weight (lbs.)
Small (2) 6’0″ – 6’4″ 140 – 170
Medium (3) 6’2″ – 6’6″ 170 – 200
Large (4) 6’4″ – 6’8″ 200 – 240
XL (5) 6’8″ – 7’0″ 240 – 280
Customer Reviews
4.5 Based on 11 Reviews
5 ★
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A TallSlim Tees Customer
algis m.
  • What is your height and weight? 6'4", 175 Lbs
  • Which size did you order? Medium

A Little Small Compared to TST, but still nice

Honestly, a little bit dissapointed by the William Mahoney shirt. It's not nearly as perfectly sized as the TST Dress Shirts (which I LOOOOVE) and the quality is fine, but I prefer the blend that TST uses in their TST-branded dress shirts. I know the William Mahoney shirt is all cotton, which some people value, but it's a little stiff, inelastic, and not as smooth as the TST blends. I really wish TST would offer some in-house dress shirts with patterns, would definitely buy several. Overall still pleased, but next time I would size up as a TST medium fits me PERFECT, but a William Mahoney Medium was too short and small. Still satisfied, but not the absolute perfection that the TST main line products are.

Daniel M.
  • What is your height and weight? 200cm, 85kg
  • Which size did you order? Medium

Slightly too short

My overall experience with TallSlim Tees has been great, and I love that the company exists and is expanding its services. However, this particular line - the William Mahoney dress shirts - are just a bit too short for my liking. The arm length is fine, neck is fine, chest width is fine, but the length of the shirt itself is perhaps an half an inch to an inch too short.

A TallSlim Tees Customer
Daniel C.
  • What is your height and weight? 6' 2" and 170 lbs
  • Which size did you order? Small

On Point

Overall experience with TST is excellent. Straightforward ordering and returns policy. Helpful sizing information. At 6'2" and 170 lbs, I feel between a 2 and a 3 for the William Mahoney shirts, so I got some of each and can switch depending on the look/feel I'm going for. Size 2 I can wear untucked and Size 3 I can wear a shirt under if I want to (not necessary).

Jay M.
  • What is your height and weight? 6’8” 180 lbs.
  • Which size did you order? Medium

Very nice shirt

Medium is always the perfect fit for me when I order from TallSlim Tees. This William Mahoney dress shirt is very nicely, but not quite as well as the TST Triblend Easy Care shirts. (For the money, I like TST better.) But, to get some variety, it’s nice to have another offering from WM, although WM is a little shorter in the body and the material is thinner, too.

Kurtis G.
  • What is your height and weight? 6-07 220
  • Which size did you order? Large

Great shirts but not long enough

I love tall slim tees, I don’t buy shirts anywhere else. These dress shirts are great but not even close to long enough. They are borderline unable to be tucked in for me. I buy large in every other style and they fit great but these dress shirts are not made to normal specs.


The pure cotton fabric is soft, light and flexible so that it will drape well on a long, slender frame while giving you a nice, crisp look.

Product Details
100% cotton (pre-shrunk)
Machine wash cold. Tumble dry low. Promptly remove from dryer.


Please refer to this size chart for shirt dimensions and measurements. The length is measured from top to bottom. The chest is measured around the entire circumference of the chest. Sleeve is measured from center back of collar like dress shirts.

Length Chest Sleeve Neck
Small 30″ 39″ 36″ 15.5″
Medium 31″ 42″ 37″ 16″
Large 32″ 45″ 38″ 17″
XL 33″ 48″ 39″ 18″

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