I made my own envelopes. Since I got the card instructions on a webpage over on the hgtv.com website, envelopes weren't included. Just like the card templates over on the Silhouette Design Store.
Last year, I got this little punch board (damn, it's almost have the price now!) and it's pretty easy to use. I printed out my own paper, some stock I've had for a really super long time, I don't even know why I bought it. I found it earlier this year cleaning out the closet in the office and it worked nicely. 80# stock, glossy finish, ink jet coating on both sides. The company I got it from is no longer in business. It's that old.
Anyway, I used a snowflake pattern (digital paper) for the inside of the paper.
For my paper crafting bestie, I like to gift her with products that I've found pretty useful. After all, if it weren't for her, I probably wouldn't be doing this. I sent her one of these for her birthday last year. I really didn't think she'd tried it out yet, it took her a while to try out the Big Shot embossing machine I sent her and when she finally put it together and tested it out, she was gobsmacked how simple it was. So, with her in mind, I made this little video when making the envelopes.