Use what you have. That's something we talk a lot about on Re-Nest, and something we're trying every day to get better at. And in this case — using mismatched vases for your flowers to create an eclectic grouping — it's much preferred over the alternative. Who wants five of the same vases anyway? This is much more fun.
Inspiration: Mismatched Plates
• Living with Mismatched (and Mostly Vintage) Glassware
Images: #1 - emmas designblogg; #2 - A Cup of Jo; #3 - Rice via The Style Files; #4 - Domino archives (now defunct); #5 - Moline via AT:LA