Wedding gift?

Best friend is getting married. I am a bridesmaid, hubby is a groomsmen and our daughter is the flower girl (my daughter is their godchild).

Bedsides my sisters wedding when I was the maid of honor (I paid for their wedding invitations as their wedding gift) I haven't been in a wedding so I don't know what the gift giving etiquette is.

Is it the same if I'm just a guest? Or is different since we've paid for our dresses, the suit rental, throw a bridal shower (gave a gift), threw a bachelor/bachelorette party etc...

Edit *** I'm not saying I don't want to give a gift because I am/will. I just didn't want to give too little.

Between the my dress $175 the flower girl dress $143, suit rental - $230 plus the girls are wearing cowboy boots $25 for my daughters $150 for mine then hair and makeup is gonna be around between 65-100 it's just a lot of money