Specimen display No 3.
3.9x7.5cm
3.8x7.7cm
3.6x7.8cm
Specimen display No 4.
5.2x7cm
4.9x7.2cm
4.7x7.2cm
The back adhesive allows the rubber to stick onto the acrylic block, which is removable also can be repeatedly pasted.
If the adhesive gets dirty and decreases the effect, use some water to clean the surface to revive them.
A mounted stamp with an acrylic block helps to stay aligned when stamping.
Use them whichever way you want!