These are my second pair of Clarks and I love the brand so much I just ordered a third pair, the Lexi Artic Mule.  The Nikki Theater Clog is so comfortable right out of the box.  I received in two days (thanks Amazon Prime!) and put them on this morning and have been wearing them since and they feel like slippers.  I usually wear a 9.5 - 10 and I bought these in a 10N as I do have a narrow foot and they fit perfectly.  I hate it when the heel hangs over just a bit on a clog and these do not!  These are right on.  I highly recommend this shoe and this brand.  I don't think I will ever buy anything but the Clarks brand again.