Activity for Mrs.Rebeiro

So I have decided that I am going to DIY my flowers and the main flower I want to use are roses and hydrangeas!! Now comes the problem - I have NO idea what size roses I should be looking at getting! On some sites you have the option of stem length...

I am looking to do all my flowers diy (4bouquets - Mine and 3 Bridesmaids and 15 centerpieces - a few flowers and some fillers in mason jars) - My wedding is very casual so we will not be doing bouts or corsages and the ceremony will be in my...