I have enjoyed my Minnetonka Mocs for decades . . .these were supposed to be the 4 in a long series of very comfortable and useful footwear.  Unfortunately, they were shipped back today for a refund.  Everything looked great as pulled them out of the box . . .the same soft leather, the durable sole.  But, as I went to put them on, they just looked smaller somehow.  The reason?  They are smaller.  I have successfully ordered mens 11.5 in this moc several times before and they fit perfectly with a pair of socks.  This pair . . .again, a mens 11.5 . . .were tight and cramped with no socks.  Mine came from an Amazon merchant . . .and it cost me $12+ dollars (return postage) to  discover their change is sizing.

My suggestions:  First, order at least a half size larger than what you normally order.  Second, avoid buying these from an Amazon merchant . . .direct from Amazon through Amazon Prime will let you return them without cost if they don't fit correctly.