I bought this and the other thicksole slippers (http://www.amazon.com/gp/product/B00980LQ8I/ref=cm_cr_ryp_prd_ttl_sol_0) by the same company. I find that the sizes are as advertised -- make sure to look as they are different for men and women -- and the soles are both sturdy.

I prefer this simple bamboo insole because it feels sturdier and keeps my feet feeling fresh and clean. If you know that you don't like bamboo or cool under your feet, I would probably go for the thicksole style.

In the end, I liked both, so I bought every size (mostly bamboo and one more thicksole) so that visiting guests can use them as we don't wear shoes in the house and the tiled floors can get cold.

I think they will last a long time and remain sturdy -- these aren't the soft, suffocating, fluffy bunny slippers that feel dirty with wear -- and will be easy to clean. Highly recommend! :)