25mm by 25mm
The original glass! Lanthorne leaf is created by soaking and pressing a horn plate several times over a period of months. This process removes the colour from the horn leaving a beautiful translucent amber coloured pane - ideal for lantern repair.
The leaf was traditionally sold by the square inch, which now equates to 25 square mm.
To calculate the quantity you require - multiply the length of the piece by its width and divide by 625.