Ginny wanted Ron to get it into gear so Hermione could be her sister already. Sister-in-law, technically, but those were pedantic details. He clearly needed to know what he was missing out on.
Hermione wasn't the sort to wear something too scandalous, and she'd probably insist on her terrible, work-appropriate heels, so Ginny's dress options were limited by that. She did own a stunning pair of gold sandals - maybe she could reduce the heel a little bit so Hermione would be more comfortable.
She tossed those on the 'keep' pile, along with two dresses. Then, while she waited for Hermione to pop over, she looked about the room for some shoes that would go with the black dress - Hermione couldn't wear plain black heels and the dress she'd picked out. She heard the pop of Apparation and called out, "In the bedroom, looking for better shoes - if you see Seeker, grab her so Bob can roam about the place without fear while we're out." It would never stop amusing her at how terrified Bob the Dog was of a tiny cat.