Ollivander's Wand Shoppe.

Ollivander's is a fine wands shop described as narrow and shabby, with a sign that reads Ollivander’s: Makers of Fine Wands since 382 BC in peeling gold letters over the door. The only display in the window overlooking Diagon Alley is a single wand lying on a faded purple cushion in the dusty window. Within, there are countless narrow boxes piled neatly right up to the ceiling and a spindly legged chair (Hagrid however breaks it after he sits upon it).

Mr Ollivander, the pale-eyed, white-haired shopkeeper, makes and sells the magic wands to witches and wizards as they enter school or break their old wands. He remembers every wand he has ever sold. To determine the best wand for a witch or wizard, Mr Ollivander measures various body parts and then checks the reactions of various wands to the buyer, a process he refers to as "the wand choosing the wizard."