Hi,

The pedals that fit toeclips are often not wide enough or long
enough for some some people just used as platform pedals.

Basically they are not designed for that purpose. MTB pedals are.
The best platform pedals are MTB pedals, you have lots of choices.

http://www.ebay.com/itm/WELLGO-PLATF...9d4c01b8f#shId

Is just an (good value) example.

rgds, sreten.