Filet crochet chart based on a design from the Antonie Ehrlich Crochet Book, No. 3, Filet Crochet, published in 1915.

Recharted and adapted from the original by Sandi Marshall.

Approximate finished sizes in filet crochet
(once through the chart, worked in 4 dc mesh):
With size 10 thread (431 yards) and a size US 7 steel hook, finished size is about 14 inches x 15.5 inches.

With size 20 thread (405 yards) and a size US 9 steel hook, finished size is about 13.4 inches x 14.9 inches.

With size 30 thread (378 yards) and a size US 11 steel hook, finished size is about 12.8 inches x 14.3 inches.

With fingering/baby weight yarn (946 yards) and a size US F hook, finished size is about 42.7 inches x 44.6 inches.

With sport weight yarn (1097 yards) and a size US G hook, finished size is about 48.8 inches x 50.8 inches.

With worsted weight yarn (1248 yards) and a size US I hook, finished size is about 54.9 inches x 57 inches.