I have wide feet and own 2 pairs of Softwalk San Mateo clogs.  They are true to size.  Very soft to walk in.  Sole is non-slippery, about 1 and 1/4 inch heel.  The little leather split detail on top of the shoe is pretty, but also does double duty as a little extra stretch to get big feet in.

I got my first pair about a year ago, and now went back to buy a second pair - that's how much I've enjoyed my first.  For me, Softwalk shoes are great for the office.  Comfortable enough for my wide feet, and dressy for business casual clothes.  I wear a WW, and sometimes you find even double wide to be narrow.  And sometimes double wide shoes have a short rise and the foot won't fit.  And sometimes you have to buy a size bigger to get the foot to go in - none of these problems are present here, runs true to size.  I own a black woven and medium brown.