The garment is elastic and will fit sizes a little smaller as well as a little larger than the measurements given.

Pattern from Stitchcraft magazine, 1933

Tension: each circle should measure 3 inches after pressing.

Yarn requirements: if two colours used you will need 3 ounces of each colour, if you use just one colour, 5 ounces will suffice.
4 press studs needed for closure plus 3/4 yards of ribbon for shoulder straps .