I love Sanuk's shoes because they are quite durable and have a wide toe box. They slip like crazy on my normal sized heels. The trick I learned is to check the Sanuk website and see what they recommend (i.e. they will actually tell you to go a size up or down depending on the model). I find it insane and annoying that they don't adhere to the same final standard for shoe sizing. Another trick is to avoid all sanukas with this heel design, which is just a collarless piece of cloth. I noticed that the Sanux with the heel collar wraps the foot better and slips less.
Merrell Men's World Vue Black Loafers & Slip-Ons
48 Review
53534 Titan Safety Toe Men's Shoes by Timberland PRO
46 Review
Wool Blend Slippers Heathered Leather Maximum Men's Shoes and Loafers & Slip-Ons
58 Review
Men's Merrell Jungle Waterproof Slip-On Loafers in Gunsmoke - Shoes for Superior Comfort and Style
47 Review