Hi Priya,
First of all, I love your accessories!! So pretty.
Second, have you done any research on the bridal company? Can you find them anywhere online? Do they have a phone number where you can speak with someone directly? Where and when is the bridal show? If they are 'up and coming' you need to weight how your shop will benefit with their limited exposure.
Third, ask yourself, do you need to send them? it looks like your shop is successful as it is! I would say, if you have a pair that you can spare and wouldn't really care either way if they were returned to you, then there isn't a loss. You wont be able to sell what was used in a photo shoot or show anyway.
I was recently asked to donate a couple items for a website and book launch. I researched the company, who is also up and coming but has SO much press already. I found their launch date and place, and after speaking with the founder, agreed to donate. Turns out they are also going to put me in their online shop and put my business cards in their goodie bags for press and celebs. It was so worth the research!!!!
Good luck! Hope that helps :)