my son is almost 6 and we were attending a black tie wedding in CA....almost had him wear just a suit but the bride begged us to get him a tux and we're so glad he did. it was so adorable. the tux was perfect, really good quality - even his tux shirt came with black studs! loved the pintucking on the white shirt. he is a perfect size 5 on the top and he's tall, so i had the pants let out at the dry cleaners (for $[...], ouch) and they were great.

the funniest thing was, my husband forgot his cufflinks and studs, so he borrowed the studs and our son just had a white buttoned up shirt.