Have you tried making the slimline card or mini slimline card size? I like the slimline size for a change and also I think they're a great way to disguise a birthday card that has money or a gift card in it, because you can put them in a regular business envelope. The size I use is 3.5"x8.5".
That way, if there's a bad guy looking to steal a birthday card, they'll flip past it. Now, I know you're thinking, "How often does that really happen, Char?" and I gotta tell you, I'm certain it happened to me and since I was stupid and used cash, $50 as a thank you to someone was gone. Now, I'm back to writing checks. So give it a shot to disguise your cards, plus, slimline design is fun to try!
This card uses die cuts and stickers from a card kit I got from Spellbinders on sale. They will sometimes put their card kits on clearance and I feel like I got a steal when I pay under $30 for stickers, papers, dies, die cuts and stamps that all go together. For the May 2020 kit I bought, I also got sequins and tiny puffy stickers. Head here if you want to see what's available right now. Not an affiliate, just sharing info!