what is size 5.5 y

Help. Girlfriend told me she's a size 5.5 shoe and I don't know what that means. which is used here most commonly? I'd say I'm a 10 cos it's the UK and
Size 5.5Y – Sneak City Nike Kyrie Preheat Heal The Word Youth Sneakers Size 5.5Y - afp-fysiotherapie.nl Kids' Shoe Size Chart: Children's Shoe Sizes the Easy Way! Nike Air Jordan 1 Mid Big kid's Size 5.5Y Golden Harvest,Brown White | eBay Nike Kobe 5 Protro Year of the Mamba Eggplant Size 5.5Y – East Coast Kicks NIKE AIR JORDAN 5 RETRO BOYS BASKETBALL SHOES SIZE 5.5Y | eBay Size 5.5y – Sole Zone VA ADIDAS ORIGINALS X JAMES JARVIS CAMPUS 00S SHOES KIDS ID9861 Size 5.5Y Womens 7 - afp-fysiotherapie.nl Amazon.com | Jordan Youth Air Jordan 1 GS 553560 053 Vintage Grey - Size 5.5Y | Basketball Jordan UNC 1s Size 5.5Y – My Cuzin Vintage Cleveland Nike Air Jordan 11 Retro GS Cherry Youth Size 5.5Y Red White Shoes 378038 116 | eBay Nike (GS) Kobe 8 \ Kids Jordans – Size 5.5Y (2 Pairs) - ecay Amazon.com | Jordan Youth Air 6 Retro GS 384665 062 Hare - Size 5.5Y | Basketball Size 5.5Y (7W) – Tribute Kicks Nike Youth Boys Size 5.5Y LeBron Soldier Sneakers AA1352-005 Basketball Shoes | eBay Jordan Oreo 5s Size 5.5Y – My Cuzin Vintage

Birthday Cake Blaze Kills 13 in French Bar what is size 5.5 y North Korea Missile Launches Prompt U.N. Security Council Meeting what is size 5.5 y Italy Could Imprison Parents Who Impose Veganism on Their Children what is size 5.5 y Jo Cox Killed Because of Her Political Views: Husband what is size 5.5 y

what is size 5.5 y Gold White Black Red Blue Beige Grey Price Rose Orange Purple Green Yellow Cyan Bordeaux pink Indigo Brown Silver