We arrange all of the snowboarding boots on the BargainBoards.co.uk website according to their UK size. We hope this makes it easy for you to buy the right kids pair. Listed below you should find all of the snowboard boots we have available in UK size 4 and 4.5. This is equivalent to mondo 23 and 23.5 cm or 37 and 37.5 in european sizing. We recommend always buying snowboard boots 1 whole UK size larger than your regular shoe size. Please vist our Advice Centre for more guidance on snowboard boot sizing and how to buy.