My son's head is exactly 52 cm which is an XS, but debating if I should go for the size S instead since he's growing so fast-any input?
485107
you could go with the small and just ensure that the helmet is tightened down as far as it can be for max protection
1442388
Measure the child's head and use the chart listed - my 5 yr old son measured as a large so I contacted the company to ask and they said it sounded big but just trust the chart. I did and his large helmet was a perfect fit! Snug but not uncomfortable.
1288746
I purchased a 12 in for my 3 year old and 16 in for my 4 year old. Our eldest fit well but it was slighty to big. He fit perfect a month later as you know they grow too fast. If I put the 4 year old on the 12im his knees would have been in the handle bars. I would say go with the 16in
1409624
My daughter was 50" and 56lbs when i bought them and got her a medium. They fit perfect. I would say a medium would work fine for your son.
1677734
I bought S/M for a 10 yrs/old and it fits perfectly (with some space for head growth since the helmet is adjustable). I would think for 5 yr/old she needs either xS or a S - you need to measure her head and look at the sizing chart. Good luck!
50559
I went directly to the luckybums.com website for sizing information. They show the sizes and what they work out to in circumference measured in cm. There is even a cm to inches conversion chart if you don't have a metric tape measure. Measure your head (or your son's) and now you can match up the size. Easy! This form of "Showrooming" works well for amazon providers who don't give much relevant information on their products on the Amazon site.
201685
We bought an adult XS when my daughter was 10yrs old average size. My son, now 12, 57" and 70lbs still uses it 7 years later. It was very big on my daughter but mom used it when our daughter was in the pool on the cold days of races in early spring. I would by a size up so she can use it for several years over her full warm-ups and uggs. It will be long but zips from both ends to allow walking. She may look like a Jawa from Star Wars but she'll be comfy
238552
They are only slightly smaller than you might expect. I wear 3x and 3x fit fine. Just a slightly slimmer fit, but still relaxed. So I'd go with XL if that fits him comfortably.
954624
My 8 yr old. ...55 lbs wears the small and i have to pull the shoulders tight. I don't remember if they have an XS or not but you might want to look for that. They are great for keeping them warm and dry.
1435938
I'm about five and an xs fit well. I ould suggest a small or medium depending on if you want it to be tight or looser.
668988
Im 53" and 112lbs and bought the XS which fit perfectly. Probably you should go for a S due to bigger/longer legs. Best if you consult the size chart on the web page.
369091
I would buy this one. I was in the same situation as you and decided he would only get bigger. He would outgrow the small ones within months. The youth ones are quite a bit smaller. My son's friends have the youth ones and they like my son's better. Good luck:)
181167
Hi TW, I think the ML size would still fit him. The sizes are made to be a bit loose to allow for extra layers underneath so I think it would fit fine. The XL/XXL size would be too long for him.
948685
Well my son is 121 cm in height and weighs 21 KG and I got him a large and he was 8 yrs old back then. So you do the math as I haven't seen the XL but I would expect it will be too small for your kid and deffenitley too short.
317742
XS fits ages 4-6 , my son is 4 and the xs fits perfect , if you want it bigger so he can grow into it then small should work.
668990
I´m 5´3" and 112lbs and bought the XS which fit perfectly. Probably you should go for a S due to bigger/longer legs. Best if you consult the size chart on the web page.
1723272
Definitely the larger for your older. If your younger is on the bigger side, especially with head size, I would get the larger for them, too. My boy finally will swim under water because of these!