The 1955 design of Minnie with Goofy and some of the Mouseketeers including Karen Pendleton
The costumes of Mickey and Minnie in 1959 had larger heads, and Mickey had black shoes.
These Mickey and Minnie costumes, shown in the early 1960s had even larger heads. They even wore hats. Also, Mickey had yellow shoes, and Minnie had green shoes.
In the 1970s, Mickey wore an orange-bow tuxedo and pants without buttons, And Minnie had a red bow, yellow dress and red lipstick. Both of them had five-fingered gloves.
The Mickey and Minnie costumes seen from the 1970s up to 1988 but retired at Tokyo Disneyland in 1992. As for Mickey, he now has a yellow-bow tuxedo and red pants with buttons and hips become rounder. And as for Minnie, she now has red and white-spotted attire and yellow shoes. Their gloves are now four-fingered. These costumes were also used for live appearances (such as Disney Educational Videos and Disney on Ice) at the time.
The current Mickey and Minnie costumes. They were first seen in late 1987, but they were not officially used until 1988. Even then, Disneyland did not officially use these costumes until late 1988. Tokyo Disneyland got them in 1990 during the Tokyo Disneyland Electrical Parade but were not officially used until mid-1992.
Mickey and Minnie as they appear at the Times Square Disney Store Grand opening (along with Princess Tiana, Princess Cinderella, Princess Belle, Phineas, and Ferb)
As of April 16, 2016, Mickey and Minnie's faces were given makeovers. Their eyes become taller and pull a bit closer to one another. Also, their bottom lips are rounder. As for Minnie, she no longer has make-up. Also, their gloaves have thinner and longer lines.
During the soft opening of Shanghai Disneyland, Mickey's iconic outfit gets a slight makeover with a smaller yellow bow and his pants leaving out the black lines. For Minnie, the spots are now on her skirt, pumpy sleeves, and bow which is slightly bigger and floppier. Her bodice on the dress now consists of three white buttons and a white flower-shaped collar. Her shoes now have red bows.
In the Golden FairyTale Fanfare and Mickey's Royal Friendship Faire, Mickey and Minnie still have their 1970's gloves.