Pattern for place mat and matching coaster.
Skill Level is intermediate.

Placemat: 485 yd
Coaster: Written pattern for 9 rows. Rounds 10-11 are charted with a photo tutorial. 165 yd

Variations by using #10 thread and a size 1.90 mm hook the finished size will be 7.5nches in diameter.
So can make bigger or smaller depending on size of thread and hook
Bobble stitch is the same as a 2dc cluster stitch.

Pattern 27, pp. 62-63 in Magic Crochet.
Pattern 11 in Crochet Monthly