These are not very warm pajamas, but that makes them more versatile. In winter my boys wear a tank top underneath. The design is attractive and the dimensions are spacious and comfortable. My boys are 5 1/2 and 7 years old, they mostly wear size 8 clothes on tall boys (fits a few sizes 7 here and there). They worked well for both.
π Snug-Fit Sleepwear for Boys: Amazon Brand - Clothing, Pajamas, and Robes
55 Review
Amazon Essentials Snug Fit Pajamas - Stylish Boys' Sleepwear & Robes Collection
44 Review
Enfants ChΓ©ris Toddler Pajamas: Warm Cotton Pjs for 24M-6 Year Old Girls Boys
50 Review
Snug-Fit Cotton Pajama Sleepwear Sets for Kids featuring Disney, Star Wars, and Marvel by Spotted Zebra
54 Review
Arctix Youth Pants Reinforced: Large Boys' Clothing for Active Adventures
46 Review
Waterproof Cozy-Dry Rain/Snow Pants for π§ Kids by JAN & JUL, with Fleece Lining
64 Review
π Fruit of the Loom 6 Pair Cushion Ankle Boys' Clothing: Comfy and Stylish Selection for Active Boys
57 Review
π₯ Stay Warm and Active with Rocky Fleece Thermal Underwear Bottoms for Boys
44 Review