Rubber stamps available as um, cling mount or wood mounted.
M187 Heart Frame 4 x 3-1/2"
M188 Heart Spatter  3-13/16 x 3-5/16"
M189 Heart Brushwork 3-7/8 x 3-3/8"
 
These are close in size so can be layered.
Smaller sizes also available (see size comparison)