Superfeet half insoles. 3 pair. Gently used. From smoke-free home. The two black slims are same - US W 6.5-8. Good for slim boots or low heeled shoes. Also slim sneakers. Middle brown is wider - US M 5.5-7. Good for work boots or men's shoes. I wore in US W sz 8 boots or trainers. Note: they are half insoles so more flexible in terms of fitting different shoes.