The Inside of the Card
Ideally, there should be continuity between the front and inside of the card design—whether that’s by color, image, patterned paper or font style. You can also continue the theme by having the first part of the card sentiment split between the front and the inside. For example, the outside might say “Wishing you…” while the inside says, “…a beautiful birthday!”. The card inside is generally not decorated as much as the front, but will have some of the same elements.
To decorate the inside of your card quickly and easily, you can simply line the inside with a paper that coordinates with the outside. (Leftover strips are great for this!) This technique is perfect if you’ve attached brads through the front of your card, and you don’t want the brad “legs” to show on the inside. You can line one or both of the inside panels of your card—but be careful not to glue the paper over the fold line in the card center, which can cause the paper to buckle and shift.
Sign your card and write your message on a piece of solid paper, then adhere that on the inside—especially if the paper you have inside is patterned or a dark color. (This is a great way to prevent any errors in writing, spacing or spelling your message…if you goof, you haven’t ruined the card!)
You can also add coordinating embellishments on the card inside, but remember that you’ll want to keep them relatively flat so the card can close without making an impression on the front.