These signs are great to put in 4x6 frames. They were designed with the blue/green/brown color scheme in mind. It is best to print them off on cardstock paper because it is more durable than regular printing paper. The background is left white so that you can print the signs off on colored paper if you would like. However, you can also choose to print them off on white paper. Either way. To make them fit a 4x6 frame, you will need to glue the signs to background paper. Slide number 2 shows how I did that.
I hope you and your students enjoy this item. If you would like signs with different border colors than what I have provided, or with different centers selections, please feel free to contact me.