It's about the curve of that heel! No-frills Baby Doll pumps have a "sweetheart" vamp and 3 1/2" heels. Top stitched around grosgrain edging. Not a whole lot to say. They are Mid Century Minimalist! Soles looking good but one heel cover shows a bit more wear than the other, which can be seen in photo of soles.(extreme, hi-res close ups may show lint that ordinarily cannot be seen)

They measure just over 9 1/2" from toe to heel on the INSOLE and 2 3/4" across the ball, also on the insole.
ON SALE? It could be. Private sales are done here from time to time so look for a dark pink sale banner with a discount code (percentage off) on any of my shop pages. Individual items do not show sale prices during private (non-site-wide) sales.

This item is sold from an excellent, highly rated vintage boutique in Northfield, OH.