From WED Disneyland Dictionary 1968
Offers gay and unusual hats of every description for purchase.

From Steve Birnbaum brings you the best of Disneyland 1982:
Just now, the Mad Hatter, with its pale green-and-white wallpaper, is merely a great place for hats-billed caps in tweeds and corduroy, bowlers in several colors, Mouse ears and fancy bonnets, cowboy hats and feathered Tyrolean hats, gangster hats, and such-plus lacy parasols, sunglasses, and assorted souvenirs. At the completion of the Fantasyland renovation- which will leave the shop looking like a half-timbered, thatch-roofed cottage on the outside and a rabbit's hole from Alice in Wonderland on the in- side-it should boast plenty of atmosphere as well. Names may be embroidered on hats purchased here at no additional charge.

Moved to new location in 1983