Not for long hair... pretty small [SEP] They are extremely cute and I like that it's fabric over the plastic... however... they are SMALL!!! I purchased because it was for long hair,  but all my hair does not fit in these (barely fits my head and I don't think my head is that big.  Lol).  I'll keep them for my 6 yr old daughter to use as she will love the design. And I am not sure how this would be adjustable...it has nothing on it to change the fit.  Also, the designs might be different that the pictures.  I didn't receive the polka dot one...but no biggie, just an FYI.