For Sale: Frames 18in to 24.5in! Holdsworth, Mercian, Hetchins, Chas Roberts, Jack Taylor etc

Hmm, ok.
I'm 5ft 2 pushing 3 with an inside leg of 29inches. I've been looking for a frame for a while and been contemplating a 20 inch bike but can't help but think perhaps it would be too large. Not sure if this would be too small though...
Any advice?

For reference; the 50cm Koga I had up recently fitted my daughter nicely (with the saddle at pictured eight), she has an inside leg of 31".