Multiple of 20 stitches plus 13
I Love This Yarn Pink
Seed Stitch border (12 stitches and 18 rows) repeats on back side

About the comment about the repeat being 16 stitches rather than 16: She’s correct that the circles are 16 stitches wide but it takes a few more stitches to complete the repeat (20 stitches).

Corrections made to Rows 5, 12 and 13 of the written pattern to fix the stars () for the repeat. The original chart was correct.