I have worn Reef flip flops for years and absolutely love them!  I bought a pair of Ginger sandals years ago that are finally wearing out.  I ordered my usual size 9 shoes that I wear.  After putting them on, I noticed that they were super small--tight under the straps and the shoe is short.  I should have ordered one whole size up to have them fit like my old size 9s.  Why did they change the sizing?  I sent these back and didn't even reorder a larger pair.  Sad to say, but maybe it is time for me to branch out from Reef sandals.