Eton Suit

Big Boy needs an Eton Suit to wear at his Godmother's wedding.

What is an Eton Suit?

From 1820[24] until 1967, boys under the height of 5'4" were required to wear the 'Eton suit', which replaced the tailcoat with the cropped 'Eton jacket' (known colloquially as a "bum-freezer") and included an 'Eton collar', a large, stiff-starched, white collar. The Eton suit was copied by other schools and has remained in use in some, particularly choir schools. From the Wikipedia entry.

Blue Linen Suit at The Best Dressed Child.
Navy Blue Velvet Suit at The Best Dressed Child.
Navy Blue Navy Blue Pique Suit at The Best Dressed Child.
Black Leather Oxford shoes at The Best Dressed Child.
Patent Leather Oxfords at Dapper Lads.