This is from a lovely French site that seems to have lots of directions and tutorials. Translated tutorials are a little hard to work with, but there's so much here I'm excited anyway.
Ratelier à outils de jardin Instructions de montage...
Taille 36 à 58...
Ravelry: Overlay Mandala No. 1 pattern by CAROcreated design
This Paint Splatter Square is an excellent way to use some of your scrap yarn, especially pieces of 1 meter or less. Pattern by Suzi Lock.
Joyous Squares Afghan By Dot Drake - Free Crochet Pattern
Free Overlay Crochet Mandala Patterns | Ravelry: Project Gallery for Overlay Mandala No. 1 ... | mas crochet
Ravelry: gabyv's Crochet bag
My placemats came out 37 cm (or 14,5 inches).