Hello,

This kit already comes premade/prepackaged by Dimensions. I am not sure if they even make it in a bigger size?! You can check out their website (http://www.simplicity.com/our-brands/dimensions-crafts/) to see if they have something bigger or you can always email them and ask? We get this from a distributor so this is the only size we have it available in.

~Kristi @ ECS

This kit shows that it is on 18 count and I'm assuming, OVER ONE square. You might want to consider about going OVER 2 squares instead to enlarge it. The only concern would be a potential for "distortion" of the picture by doing this... I would follow Kristi's instructions and even ask Dimensions about any distortion be stitching, "over two".
I believe thare are cross stitch websites that can "enlarge" a pattern, but you would need to check around on the internet.