Size L fits my 7 year old son really well , he loves it. This hedgehog dressing up reminds me sonic the hedgehog in design, it fits my 7 year old like a glove , you get the costume , mask complete with ears and spikes , the mask fastens by velcro at the neck.The main body of the costume is zip fastening and very easy to slide into , the feet are open at the bottom.It's maybe a tad expensive but fits really well and looks comfortable to wear , my 7 year old son loves it , he's planning to wear it for the upcoming Halloween but it can be worn any time of year.Another nice dressing up costume for the dressing up box my lads have always enjoyed dressing up since toddlers.My son really loves it so I'm happy and the quality is qood.