Skill Level = Advanced

If you use crochet cotton no. 5 and steel crochet hook US size 2, mat will measure about 23 1/2” across.

A doily in 21 rounds

Pattern features:
triple triple crochet
scallops
triple triple (trtr) V stitch
picot

Pattern 14 on p 27 in Decorative Crochet.
Pattern 6, Allegro, in 1000 Mailles.