Milkshake3, first of all, congratulations to both you and your son for opting for Eton. I sincerely hope he makes it. I understand this year there are appx. 1000 boys vying for about 240 places, the Oppidans, in Eton argot.
Additionally, there will normally be between 120-150 exceptional boys vying for the 14 King?s Scholarship places each year who will enter Eton as King?s Scholars (KS) if successful.
Eton is the largest public school in the UK but please, please don?t be scared about the size of the place. Your boy won?t be covering every inch of the campus if he goes there. He would spend most of his time between his House and his classrooms and perhaps going to the playing fields in the afternoon. His Housemaster with the assistance of the Dame (matron) together with his personal tutor will be the 3 most important adults in his life at Eton. Just think of the House as a small prep school (there are 25 of them including College) and each House has its own quirks and rules. The boys? allegiance is to their House.
Besides College where the 70 King?s Scholars live, each House has a total of appx. 50 boys, i.e. five year groups (called ?Blocks?) with roughly equal number of around 10-12 boys in each Block ranging from ages 13 to 18.
Your DS will quickly learn the ropes about the school and the size of the school never did pose a problem for any boy or his parents after a couple or so weeks once he?s there.
PM me if you think I can be of further help.