Do you all mean pentagonal???
I think thai's (atleast the ones I had) were pink pentagons...
I think (emphasize think) that TTokyo winny tabs are pink and pentagonal...
As far as octagonal, I don't believe I have seens octagonal winny tabs...
unless, you are referring to the cetabon tabs which are almost round but could possibly be slightly octagonal..these are scored with a letter (which I do not recall) in the middle.