The models indicated as being 'plain' will be square/rectangular cut, and those models denoted as 'shaped' feature arched or rounded/angled corners.
BUTLER Replacement Stove Glass Ceramic Heat Resistant Glass For Butler Stoves
BUTLER Replacement Stove Glass Heat Resistant Ceramic - Various Butler Stoves
Butler Replacement Stove Glass-Heat Resistant-VARIOUS MODELS
HD Stove Glass UK Ltd - Woodman Page (Small Glass) High Definition Heat Resistant Schott Robax Replacement Stove Glass 160mm x 42mm - Thickness 4mm
HD Stove Glass UK Ltd - Woodman Squire (Small Glass) High Definition Replacement Stove Glass 232mm x 46mm - Thickness 4mm