Get In On Your Groove With The Yvolution Twista Learner Skates .Features A Dual Stage Kids Roller Skates That Is Perfect For Toddlers And Young Kids .Unique Patented ‘Switch’ Technology Lets You Change From Learner To Inline At The Touch Of A Button Depending Your Kid'S Confidence .46 Mm Pu Wheels And Abec-5 Bearings Gives You The Smoothest Rolling Experience .Size Of The Skates Can Be Adjusted Up To 4 Sizes - 12J To 3 (Us), 11 To 2 (Uk), And 30 To 34 (Eu) .