I'm an adult with a small head and they fit great. I put these on my 3 year old for fun and although the handles are a bit longer they fit him well too. He has a normal sized head for a toddler. I wore them all day at work and accidentally put them on at home so they are pretty comfortable. I find they block the harsher glare from my monitor and overhead lights in the office. Plus, they're super cheap.
Pro Acme Unbreakable Kids Blue Light Glasses π for Clear Vision during Computer Gaming and TV Screen Time
11 Review
π Xiaomi Adult Anti-Blue Goggles Pro - Computer Glasses, Non-Diopter, White Frame, Yellow Lens
14 Review
GUNNAR Optiks Gaming Glasses: Blue Light Blocking, Screen Protection, Anti-Reflective Elipse
11 Review
MIGSIR 3 Pack Blue Light Blocking Glasses for Computer Gaming Eye Strain, Round Fashion Faux Eyeglasses Frames for Women Men with Enhanced SEO
13 Review