LaBlanche siliconen stamps are foam mounted stamps, so there's no need for using a acrylic block. These wonderful nostalgic stamps are very detailed and we recommend using the Versafine inks. Also we suggest when using the stamp for the first time cleaning it with a baby wipe to clean any silicone residu that is left over during the manufacturing process. This will give you a 100% perfect stamped image. stempel is 10x11cm