I haven't made a lot of shaker card. This was only my second.
To create my shaker box, I first cut the Happy Birthday sentiment (from the Big Balloon die set) from a 4.75 x 3.15 inch piece of cardstock. I positioned the die in the bottom (centre) approximately 0.5 inches from the bottom and ran that through my die cut machine. I then carefully used my paper trimmer to cut out the inside of my rectangle panel to leave the sentiment and a 0.5 inch frame.