Blue Mountain has been around for a long time, and they have beautifully designed ecards for any occasion. This site offers a free no-obligation trial, and then you can choose to continue membership for a low monthly fee if you decide that's the way you'd like to go. If you find yourself sending quite a few ecards and you're looking for a site that delivers high-quality artwork and messaging, this might be a good choice for you. As of 2018, a one-month membership costs $4.99; a one-year membership, $19.99; and a two-year membership, $29.99.
I use these not only as bday cards but as invitations to bday parties since they are blank inside. I'm most pleased to have purchased this set since I send out a lot of bday cards, and this has a great price per piece. Vibrant colors, fun photo pix, and you don't have to worry about some cheesy poem in the center. Just write happy bday and your own note and you're good to go. Good card stock, and I love the yellow bright envelopes.
There are many options for printing great-looking birthday party invitations, but the most economical way is to print on a premium 16-point gloss paper. You'll also want to stick with a standard size such as 5-inch by 7-inch to keep your birthday party invitation printing costs cheap; however, when it comes to colors you can go with full color since this option really costs little more than black and white yet has much more bang for the buck. Beyond those options, you would be wise to get matching envelopes (also cheap) and have a hardcopy proof sent to your doorstep before you actually print the entire run. The last thing you want is for a mistake to go unnoticed until your invitations are printed, when it will be too late or too costly to make changes. A hardcopy proof does cost a few dollars, but it's cheap insurance that the rest of the run will go off without a hitch. Pass your proof around to friends, family members and co-workers so you can get more than just one set of eyes looking it over for errors.