About Sizes:
This magnetic cleaner from SWETOR is meant for glass tanks and comes in a few different sizes. When choosing a size, remember that the larger the cleaner, the stronger the magnet.
S: 3.7 x 1.8 x 2.1 inches (for 5 mm/0.2 inch glass)
M: 4.5 x 2.3 x 2.5 inches (for 7.5 mm/0.3 inches glass)
L: 6.1 x 2.7 x 2.9 inches (for 11 mm/0.45 inch glass)
XL: 6.9 x 3.1 x 3.3 inches (for 15 mm/0.6 inches glass)
