Rubber sole
2.5cm(0.98 In) Heel: Practical for Work-to-weekend Wear
Normal fitting(not wide fitting), will be tight for wide feet.
Normal arch, will be tight for high arch.
If the shoes are larger for you, you could use heel stickers. Stick them on the heel of the shoes. Heel sticker could avoid water bubble too.
Women's Casual Genuine Leather Penny Loafers Driving Moccasins Slip-On Boat Flats Shoes