Three thicknesses (50mm, 25mm and 90mm) and various sizes (see below), mainly Unilin plus a couple of Celotex boards.
Available in any number or combination.

50mm BOARD SIZES (photos 1 and 2):
1930 x 250 widening (for 630mm of the length) to 300mm.
2040 x 195mm
1200 x 290mm
850 x 540mm
825 x 265mm
770 x 335mm
385 x 370mm
See photo 2 for side lengths of the two irregular shapes.

90mm BOARD SIZES (photo 3)
510 x 390mm
510 x 360mm
370 x 360mm
370 x 350mm

25mm BOARD SIZES (photo 4)
1200 x 710mm
700 x 370mm
560 x 320mm.

Insulation board - various sizes (Chelmsford, CM1)