
I am 24 years old and weigh 165 pounds. 5'9. I usually go for the large boy size, but after reading the reviews and some people said it was too big, I decided to go down a size. The seat was tight but comfortable. I needed it to be tight because I was wearing it with a jumpsuit. So everything turned out perfect. Well if I made this shirt with jeans I would make a big one. Here's a little detailed review to help someone contemplating sizing as some of the reviews I've read have been helpful and some have not. Hope that helps.

The Good Day Lab Clean Shield: Ultimate Comfort and Breathability in Tagless 4-Way Stretch Polo
43 Review

Kid Nation Kids' Tagless Long Sleeve V π Neck T-Shirts 4-12 Years - 2 Packs and 3 Packs
45 Review

Soft Brushed Fleece Crewneck Sweatshirt for π Boys and Girls 4-12 Years - Kid Nation Kids
42 Review

Boys' Long-Sleeve Disney Star Wars Marvel T-Shirts by Spotted Zebra
46 Review

π Fruit of the Loom 6 Pair Cushion Ankle Boys' Clothing: Comfy and Stylish Selection for Active Boys
57 Review

Funny Guy Mugs Tearaway Sweatpants: Playful Boys' Clothing for Fun and Active Days
49 Review

π Boys' Outdoor Climbing Convertible Trousers - Waterproof | Clothing
47 Review

Boys' Adidas Active Sports Tricot Athletic Clothing
45 Review