From the sheet pattern:

Frost-tone, Article 49 was used, one cone, doily measures 21 inches. For 16” doily use size 20 Daisy -- Pattern 35 cents.

12 bone or plastic rings needed 5/8” for large, 1/2” for smaller.

A doily in 33 rounds and features:

pinwheel center
chain in chain
filet
pinwheel flower pattern
filled rings
V-stitch
pineapple style loops
5 dtr clusters