Tube socks, TTS but feel free to see measurements below
These do have stretch and elastic on the upper inside to help keep the sock up
Be sure to fluff upon arrival!
6/12mo- 10in tall, 5in upper leg circumference
1/2t- 10.5 in tall, 5.5in upper leg circumference
2/3t- 15in tall, 5.75in upper circumference
3/4t- 16in tall, 6in upper circumference