They measure approx 10.5cm x 15cm and work beautifully. They also work well through the Sizzix Big Shot or even on the original Sizzix machine.
Simply place your cardstock into the folder and run it through the Cuttlebug - simple! The cardstock can the be left as it is, or chalked/inked to accentuate the embossing. Use the embossed sheet whole as a background, or cut it up to use the words separately.
These folders work fabulously with metal shim too!