Wooowyet is a pioneer fashion shoe brand dedicated to giving you the Fashion Experience[Light Up Shoes Sneakers Family]and everyday joy. Size Description: US Size 8.5 M----Label size 25 ------ inner length 15.9cm/6.3 inches, US Size 9 M------Label size 26 ------ inner length 16.5cm/6.5 inches, US Size 10 M-----Label size 27 ------ inner length 17.3cm/6.8 inches, US Size 11 M-----Label size 28 ------ inner length 17.8cm/7.0 inches, US Size 11.5 M---Label size 29 ------ inner length 18.5cm/7.3 inches, US Size 12 M-----Label size 30 ------ inner length 19.3cm/7.6 inches, US Size 13 M-----Label size 31 ------ inner length 19.8cm/7.8 inches, US Size 1 M------Label size 32 ------ inner length 20.5cm/8.0 inches, US Size 1.5 M----Label size 33------- inner length 21.2cm/8.3 inches, US Size 2.5 M----Label size 34 ------ inner length 21.8cm/8.5 inches, US Size 3 M------Label size 35 ------ inner length 22.5cm/8.8 inches US Size 4 M------Label size 36 ------ inner length 23.0cm/9.0 inches, US Size 5 M------Label size 37 ------ inner length 23.5cm/9.2 inches. Inner length=feet length+(0.5~1.0cm)1inch=2.54cm / Make sure you buy from Hotdingding to get Qualified Products and Perfict Services. Friendly Reminder: It will feel more comfortable if your feet length is shorter than insole length about 0.19 - 0.80in. Cleaning and Care Instructions: -Please recharge for the first-time use. -Usually the light turns off automatically when finish recharging. -Recharging for more than 5 hours is not advisable even though the light might be still on. -The shoes are not water-resistant, so please pay attention that liquid does not get into the insole beneath which is the lighting system. -The shoes are for casual walking only. Please do not wear them when running or doing other severe exercise for protection of the lighting system.