This slightly more advanced pattern from RJ Design's has two round rug size options:
38" oval rug: 1 Jelly Roll
54" oval rug: 2 Jelly Rolls
3/16” Buttons - 2 pack
Regular price $0.50
3/4” (20mm) Buttons - Star Flower - Black
Regular price $2.30
3/4” (20mm) Buttons - Star Flower - Red
9/16” (15mm) Buttons - Star Flower - Green
Regular price $1.60