This free pattern originally published in:
Spool Cotton #226, Gifts Crocheted and Knitted 
MATERIALS: J. & P. Coats or Clark's O.N.T. Pearl Cotton, Size 5, 13 balls will make 5 mats ... Knitting Pins, 1 pair No. 1 (2½ mm. size).
Place mat measures 11½ x 1¼ inches