DIY Bouquet Advice!

I'm DIYing my bouquets. I already have the flowers made (2" paper flowers).

Problem is I feel like they aren't large enough, but I'm unsure on how to bulk them up without making them look hideous.

I was thinking one of those styrofoam things but the ones at Michaels are ugly. I also live in Canada so shipping to Canada is a must. I'm also getting married in like a month so...yea...yay last minute!

Help!