Now is your opportunity to shape the bouquet - wires should still slide relatively easily through the collar/securing wire, so you should be able to shape the dome, adjust how close the flowers are to one another, etc.

After you've done that, it's time to cover the collar, which happens in three steps. As a pre-step, if they're not already, trim or fold your floral wire stems to be all roughly the same length. Once that's done, cut the following shapes out of your fabric: