Bests & Worsts Reviews from Amazon

I am on my third pair. I love this sandal. I live in this sandal. HOWEVER........ I have purchased these before in M4/W6 off Amazon so I hit reorder for the same size I always get as they're perfect for me. (I wear a Women's 8 so that should tell you how weird the sizes are for this sandal). I get them today and they are too small! They indeed indicate M4/W6 but they have been made too small. Also, they are less wide. My other pairs have been 3 1/2" at its widest point and the new ones are only 3 1/4" so my foot hangs over the sides. Now I have to send them back and reorder again. Do I try for the same size thinking maybe this pair I got today were some defect or do I order a size up? I guess I'll try a size up and see what happens. I'm bummed. EDIT 12/19/17 : I ordered a size up and STILL TOO SMALL. I'm going to have to return these also. I can't believe it. I'm going to give up now. They've changed the sizing of this sandal obviously. If you have a wider foot, this sandal may not be an option anymore. Now I want to cry...this was my favorite. I lived in these! :(