BNIB Reebok Royal Classic Jogger women's sneaker size 6

Brand new in box. Never worn. Sticker still on shoe inside. Rebok women's classic jogger sneakers in black and grey / white. Mesh upper. Athletic sports shoes runners. Size 6. I would say fits smaller like 5.5. Size on the box and sneakers is US size 6. Size 36 EUR. Size 3.5 UK.