I wouldn't give him clothes...it's not just his wedding. Why don't you give them something for the house? Or something that they can both use.
Some sort of household appliance for himself and his new bride. Perhaps a set of pots, microwave, coffee maker, stove or something of that nature. Of course the gift that you choose will depend on your budget.
The answer depends on how much money do you want to spend.Ask them if they have a wedding gift list and choose something from there.There ar couples who post this kind of lists online.And you can colaborate with other friends to buy something bigger.The best i think is to buy something usefful for both, but try to avoid duplicates(thats why i told u about the list)
How about a digital photo frame with clock, and support for most digital media. They can load all their honey moon pics after their wedding
I think you should give him a $500 Check,after that your friend need anything,he take it as his choice.
If your friend is boy give him a beautiful watch if your friend is girl give her a Statue who remind herself
Gift them a photo frame keeping photo of couple in them with a gorgeous bouquet or you can also go for a customize gift for them like customized mug, plate and many more………….
buy anything of his/her interest, here if we are not sure about their choice, we give cash, so that they can buy on their own later.