This yoke can be worked in either size 40 or size 70 crochet cotton, which will result in a 3 1/2” deep or 2 1/2” deep yoke respectively.

It calls for a size 14 steel crochet hook (about .50mm, which is not a selection in the drop down menu).

The pattern is found on page 18 of the PDF.

No gauge is given.

This pattern was originally published in 1920.