I have size 13-1/2 shoes. I'm still looking for platform pedals made from garbage can lids. Til then, I swipe 'em from Goodwill. They can be found out back by the dumpsters. You gotta bring your own tools, though.

Seriously,
Pedals found on old 3-speeds and vintage cruisers are sometimes called block pedals or platform.

The alloy or black resin pedals on early 5 and 10 speeds, MB's (and others), have been called platform but I think they are cages intended for the toe-clip/strap/stirrup things. I used them in the early 70's with the ubiquitous Adidas 'Country' running shoe. I still swear by the resin MB type, without stirrups, with a stiff all-terrain shoe. They are inexpensive and indestructable.

Clipless? That's a contradiction in terms. I see 'em clippin' in and clppin' out. Some of them just miss and fall over. Seem's like a hassle to me. Besides, it would interfere with a good Ride-By-Kicking!