• I was wondering the same thing. I looked up the size chart for this particular item on Columbia's website.
    The size chart is for boys sizes as follows:
    XXS- 4/5
    XS- 6/7
    S- 8
    M- 10/12
    L- 14/16
    XL- 18

    The actual chart also includes body measurements, so if you're still unsure check out the link below or try looking it up.

    http://www.columbia.com/gold-550-turbodown-hooded-dow-%7C-010-%7C-s-888667231049.html?gclid=Cj0KEQjwvve_BRDmg9Kt9ufO15EBEiQAKoc6qoSfiGp4dkUFNV0g-gjbD4CQuzMEColpAdo4jWwrWFMaAlhL8P8HAQ&mid=paidsearch&eid=Google+PLA+US&s_kwcid=AL!3937!3!%7Bcreative%7D!%7Bmatchtype%7D!%7Bplacement%7D!%7Bnetwork%7D!%7Bproduct_partition_id%7D!%7Bkeyword%7D&CAWELAID=120220860000332344&CAGPSPN=%7Bifpla:pla%7D%7Bifdyn:dyn%7D&CAAGID=%7Badgroupid%7D&CATCI=%7Btargetid%7D&ef_id=Vqw6ZAAABXPSN-@L:20161012184502:s
    Answered on 10/12/2016 12:53:43 PM by Robinrox from Juneau, Alaska