This is a replacement of the fibre baffle set for many of the Jotul wood and coal stoves but may work on various other manufacturers and models based on size and shape

Replacement baffle set for Jotul stoves

Measurements:
Curved piece - 13" x 11"
Rectangular  - 12 1/4" x 7 3/8"
Two matching pieces - 5 3/8" x 15 3/4"