Roller Shoes — Nice quality, Breathable, Wear-resistant and Rubber sole, Colorful LED light, which is awesome gift for kids at Birthday, Halloween, Thanksgiving and Christmas Day or other celebration.You are cool than others when you own it ! Size Tips : To ensure foot comfort, we recommend you measure foot length ( heel to toe ) and choose the refer size correctly ~ If child wear socks, we suggest buy a larger size than usual. Size Chart :11 Little Kid —- foot length 6.98″ / 17.7cm —- EU2711.5 Little Kid —- foot length 7.18″ / 18.2cm —- EU2812 Little Kid —- foot length 7.38″ / 18.7cm —- EU2912.5 Little Kid —- foot length 7.57″ / 19.2cm —- EU3013 Little Kid —- foot length 7.77″ / 19.7cm —- EU311 Little Kid —- foot length 7.97″ / 20.2cm —- EU321.5 Little Kid —- foot length 8.16″ / 20.7cm —- EU33 3 Little Kid —- foot length 8.36″ / 21.2cm —- EU343.5 Big Kid —- foot length 8.56″ / 21.7cm —- EU354 Big Kid —- foot length 8.76″ / 22.2cm —- EU364.5 Big Kid —- foot length 8.95″ / 22.7cm —- EU375.5 Big Kid —- foot length 9.15″ / 23.2cm —- EU386 Big Kid —- foot length 9.35″ / 23.7cm —- EU396.5 Big Kid —- foot length 9.54″ / 24.2cm — EU40Regarding Two Wheel Shoes : These shoes come with 2 sets of wheels per shoe.The front wheel is removable, so you can just use the back wheel if you want. After you remove the front wheel, just cover it up with the rubber insert that comes with it.The back roller can also be pushed into the sole of the shoes so that you can just use the shoes for normal walking.The button on the back of heel control the back roller, you can pop up or hide roller by pressing the button.In sum, Double Roller Skates can be used as 3 shoes : Double wheel shoes ; Single wheel shoes ; Flat sneakers.