MBS - sealing cord under glass 8 x 2 mm, flat self-adhesive

MBS - sealing cord under glass 8 x 2 mm, flat self-adhesive

MBS - sealing cord only under glass. Price is for 1cm.
Size: 8 x 2 mm, flat self-adhesive
Recommended for replacing glass on MBS stoves.
Stove type:
MAGNUM
NEW LINE
ROYAL
KING
OLYMP
VULKAN
OLYMPIA
HAPPY

How to calculate the length exactly?
If you are not sure, the easiest method is:
Measure the perimeter: Measure the lengths of the sides of the glass with a tape measure and calculate the perimeter of the rectangle O = 2x(a+b) add 5 - 10 cm as a reserve for blending the ends and possible errors.