I bought two of these in medium sizes and delivered here in the UK within a couple of weeks. They are perfectly adjustable such that they were perfect for both my 11 year old son and his older 16 year old brother. These helmets are exceptionally well made (and have to be to hold the CE certification here in the UK) and have loads of cushioning and hard skin shell all with that perfect bump to accommodate a boy's jooda without compressing it. They look very stylish and professional and the bump for the jooda area is not actually too pronounced but is pretty much seemless in the overall design making the helmets look sleek, fashionable and pretty much indistiinguishable from the normal helmet which don't fit Sikhs with their topknot of hair. My son even likened them (as they were black rather than the brighter colours) to a kind of futuristic Starship Troopers or Call of Duty helmet vibe so he not only was perfectly safe wearing them but not a bit self conscious. These Bold Helmets are perfect for use for biking, go karting, climbing and school out of bound activities like the PGL trip - really anything that requires the use of a helmet because they have all the necessary safety and construction certification (such as the CE required in the UK and Europe). Strong, professionally built to protect the child and importantly the bump to accomodate the topknot of hair is not overly protruding or drawing undue attention to itself and the helmet is perfectly adjustable such that the medium size was great fit for both my 11 year old and 16 year old sibling so will last years of use. Frankly this helmet should be bought by every Sikh household and Sikh faith schools where you have a child with a jooda (topknot of hair) and reminds me of the Sikh metal abd chainmail helmets used by Sikh soldiers in the 18th and 19th Century with their distinctive bulge to accomodate their wearer's topknots in battle if they weren't wearing a Dastaar. Highly recommended product which does its job perfectly (to a professional standard matching normal helmets so you won't get refusal from outside agencies who are just used to normal helmets which won't fit the topknot) and will last years (effectively growing with the child as the medium size I ordered fits the head of an 11-year old and 16 year-old with the adjustable straps. I bought two (black matt, medium) so I didn't need to adjust the strap between my boys so they had their own already set to their head size and it was fast, easy delivery to the UK too. Excellent product and service.