How does UndrDog sizing run, and should you size up?
Mostly true to size. Fit is the most discussed topic in UndrDog reviews: 4,024 of 9,209 (43.7%) mention it, averaging 4.58 stars, and 771 of them say it fits as expected. It runs tight slightly more often than loose (484 against 413), so buyers between sizes lean toward the larger one.
Ratings of the reviews behind this answer
across 4,024 reviews
43.7% of all 9,209 reviews
| 5 star | 3,086 | |
|---|---|---|
| 4 star | 465 | |
| 3 star | 272 | |
| 2 star | 119 | |
| 1 star | 82 |
The table below counts how reviewers who discussed fit actually described it, matched on the phrases buyers used. Only 152 of the 4,024 fit-related reviews explicitly tell other buyers to size up, so the "order a size up" advice that circulates about UndrDog is a minority view rather than a consensus.
Fit is still where most of the disappointment sits: 11.8% of fit-related reviews are three stars or lower, against 9.1% across the corpus as a whole. The cut is deliberately close through the arms and chest, which is what buyers expecting a relaxed T-shirt react against. UndrDog's lifetime warranty covers a wrong-size exchange.
What the reviews specifically say
| Called it true to size | 771 | 19.2% |
|---|---|---|
| Said it ran tight or small | 484 | 12% |
| Said it ran loose or big | 413 | 10.3% |
| Told other buyers to size up | 152 | 3.8% |
What positive reviews say
Representative reviews rated four or five stars, quoted in full and unedited.
T-shirt guy
Coming from a guy who has well over 300 T-shirts I have some that cost $100 some that cost $150 something that cost $10 but I will say yours has to be the most comfortable shirt I have ever worn and I’m not the suit and tight dress up collar worker and a T-shirt and jeans and some cowboy boots and I’m good but I’m about ready to clean out my wardrobe and purchase some more undrdog shirts for sure
The best Polo I have ever had
This is by far the best Polo shirt I have ever owned. I love them and wear them every day. They breathe and look great. I ordered one size larger because I don't like the snug fit as they suggested and they fit perfectly the way I like to wear them. I will definitely buy more when they get them in Red and Grey.
good t-shirt for real life
These Grey(s) are my second foray into UndrDog. Finally narrowed down my ideal size (M) for a PROPER undershirt fit, under PROPPER work clothes. Still enjoying my previous Large Black T-shirts, outside work in this (90)+ degree summer heat we're "enjoying" in Denver right now. Been awhile since I've enjoyed purposefully dressing. Thanks, UndrDog...
Not my first or last
Bought 2 of black tees for work. LOVE THEM. Once I saw the grey make a show- I ordered 1 the day of. Received it and I’m just ask impressed with it. Idk know if the thread count went up on it but it has even more of a soft durable feel to it. Excited for more colors. Fits true- hides the belly- turns heads. After my initial wear my wife quit having headaches, and my dog came home.
Does Not Compare
⭐️⭐️⭐️⭐️⭐️ Fantastic experience! I ordered the wrong size, but the exchange process couldn’t have been easier. I completed the RMA, and my replacement size was on my doorstep within just a few days. The shirt itself is excellent. I love the feel of the material, and the extra length is exactly what I was looking for. Great quality, great fit, and outstanding customer service. I’ll definitely be ordering again!
What critical reviews say
473 of these reviews (11.8%) are three stars or lower. Representative examples, quoted in full and unedited.
These shirts are very lightweight. I sized up but should have stuck with my size. They are a little loose by sizing up. They have a good fit and we will see about the durability. Jist know when they say strong, they do not mean heavyweight. They are almost see through and the lightest weight shirts i have ever owned. Hopefully they are a lifetime shirt.
New Replacement Shirts Are Better
When I tried these new shirts on, they were enormous. I'm a Large and they fit very long and not fitted. But I still used them. Now that they're washed, I'll have to try them again and see if they shrunk. I still wasn't too happy about having to send the old ones back. True-Classic doesn't require that... they just ship you new ones and without any hassle.
2 out of 3 ain't bad?
I ordered shirts first.. and they were great. I ordered 3 pairs of underwear to try them and one of them has a bad seam (or to) and has a hole in it... looks like it's going to get worse... the threads are coming loose. I emailed support and got no answer. I called and got a busy signal. Not looking good so far... which is a shame, because I love the material.
Nice long fit for tall guy (XL)
Great shirt for a tall (6'-4" -216 lbs) person like myself who has a hard time finding shirts that fit. I have the XL and it is plenty long. The material is somewhat thick and feels strong. Not very good for the heat as it holds moisture longer than most tshirts. I like that it's made from hemp and other natural materials though at least. Will probably buy another.
How this answer was calculated
Every number on this page is computed from the full archive of 9,209 verified UndrDog reviews at build time, not written by hand. A review counts as evidence here when its text mentions the topic; 4,024 of 9,209 reviews do. Read the full methodology →