This is one example of a set of Linzer Cutters.  Scroll down to see the sets available.

Linzer cookie cutter sets each come with the outer crinkle edge circle cutter and 6 interchangeable centers in shapes of the theme you purchase.

Use this cutter set to make the traditional jam filled linzer cookies. This set also comes with a recipe.

Cutter measures 2" and inserts measure 3/4".