You can use any 3D design software you like, I’ll be using Blender. The idea is to trace the logo and create a 3D shape from the outline. If you’d like to follow along with me, download a copy of Blender and keep reading.

Upload the design as a background image

To open the sidebar we need, press N . Under the Background Images section, upload the stamp design. Press 5 on the numpad to orient the camera and expose the background image. If it's missing, try pressing 5 again.

Outline the design

Create a plane and delete three of the vertices, this will leave you with a single point. Position this point over the edge of your stamp design. Press e to generate a new point and draw a line from this one. Using this technique, outline the design of your stamp, merging the final points together.

Make a 3D shape from the outline