Review on Ultimate Protection for Your Little Adventurer: Bell Toddler Zoomer Bike Helmet by Tyler Smith

The description on Amazon says the size is 48-52 cm, that seems correct to me from my tests be. I tried it on our youngest son who is about 48cm head size and my middle son who is about 51cm head size and they fit perfectly on both heads. Then I tried it on our eldest son's head who is about 54cm tall and it couldn't fit on his head. The helmet itself looks like a regular kids bike helmet - comparable to other helmets I've bought at Walmart and Target.