Photos: The evolution of 'Mad Men' fashion In honor of the final episodes of the last season of "Mad Men" we look back at the television show's wardrobe, which reflects the 1960s and inspired modern looks. One thing that hasn't changed much: the look of Don Draper, played by Jon Hamm, right. Hide Caption 1 of 23

Photos: The evolution of 'Mad Men' fashion Wearing dark, formal suits was a nearly century-old tradition by the time "Mad Men" ad men donned identical looks -- with highballs -- at the Sterling Cooper agency in 1960. Their suits' slim silhouettes came from returning WWII soldiers' athletic figures, said University of Notre Dame history professor and author Linda Przybyszewski. Suits narrowed in the shoulders, torso and legs to fit the new physique. Hide Caption 2 of 23

Photos: The evolution of 'Mad Men' fashion The Peter Pan collar Peggy wears in the first season of "Mad Men" was popular in the early 1960s and signaled the emergence of youth-oriented fashion, Przybyszewski said. At the time, Joan's bow collar was considered feminine and restrained. In the '70s, bow collars would plunge to new, revealing lengths. Hide Caption 3 of 23

Photos: The evolution of 'Mad Men' fashion Housewives like Betty Draper were expected to wear cheerful colors in 1960 because they dealt with children and the home, Przybyszewsi said. They also represented life in the suburbs; women working in offices in the city wore darker, muted colors and more formal attire. Hide Caption 4 of 23

Photos: The evolution of 'Mad Men' fashion This outfit, which Joan wore in the second season set in 1962, is a great example of early 1960s minimalism, Przybyszewski said. The sweater and pencil skirt are fitted and accessorized simply, which felt modern in the 1960s. Hide Caption 5 of 23

Photos: The evolution of 'Mad Men' fashion The maternity ensemble Betty wears in the third season, from 1963, represents a social norm about privacy that eroded as the 1960s came to a close. The concealing nature of her outfit maintained the idea that a woman's body and personal life were to be clear only to intimate relations, Przybyszewski said. Hide Caption 6 of 23

Photos: The evolution of 'Mad Men' fashion Roger Sterling's three-piece suit in the fourth season represents the division of public and private at the office, Przybyszewski said. Even in 1964, a businessman would keep his jacket on to meet clients and take it off only in the privacy of his office. Hide Caption 7 of 23

Photos: The evolution of 'Mad Men' fashion The episode "The Beautiful Women" from the fourth season took place in 1965 and showed the different trajectories of three professional women's lives. Peggy's hat and gloves indicate formality in the workplace that starts to erode quickly within the next few years, Przybyszewski said. Hide Caption 8 of 23

Photos: The evolution of 'Mad Men' fashion Bare arms, short hemlines and plaid jackets, oh my! In 1966, busy patterns and bright colors became part of the decade's signature fashion, Przybyszewski said. At the time, short dresses led some men to rate women's exposed legs, with some of those "reviews" published in newspapers, she said. Hide Caption 9 of 23

Photos: The evolution of 'Mad Men' fashion "It looks like a convention of men selling used cars," Przybyszewski said of the bold blazers worn in the fifth season of "Mad Men." Ad men would never wear these outfits to the office in 1966, but it signifies a move away from their previously slender silhouettes. "Many a large person has been scared off from wearing plaids," she said. "Plaids always look bigger." Hide Caption 10 of 23

Photos: The evolution of 'Mad Men' fashion By the sixth season, it was 1968, and Megan Draper embodies the spirit of fashion experimentation, Przybyszewski said. Megan and Arlene are "supergroomed, superkempt," she said, as they take on new personas with wigs, caftans, colors and silhouettes. "It's an interesting '60s phenomenon that utterly disappears," she said. Hide Caption 11 of 23

Photos: The evolution of 'Mad Men' fashion Black women carried a heavy style burden when their workplaces were run by white people, like Sterling Cooper Draper Price, Przybyszewski said. Many felt pressure to dress better than anyone else in the workplace, she said, and they still faced judgment -- especially of their hair -- from white and African-American colleagues alike. Hide Caption 12 of 23

Photos: The evolution of 'Mad Men' fashion After Don Draper's personal crisis in the sixth season left Peggy to try to assume his role, she looks every bit the executive, Przybyszewsi said -- and every bit the fashion leader. Her knitwear ensemble was meant to show she has more important things to do than iron shirts. Hide Caption 13 of 23

Photos: The evolution of 'Mad Men' fashion The advertising industry has always been opportunistic when it comes to new ideas, and so is fashion, Przybyszewski said. Maybe the "Mad Men" execs weren't ready to don dashikis and beads -- yet -- but they surely tried to capture some of the groovy, creative spirit they suggested in the late 1960s. Hide Caption 14 of 23

Photos: The evolution of 'Mad Men' fashion Over eight years in the "Mad Men" world, hemlines for women raised nearly as many inches, Przybyszewski said. By 1968, miniskirts were so ingrained in the public consciousness that women came up with solutions for flashing people when sitting down. One banker from Miami, interviewed by Time magazine, said his office's solution was to make women wear matching underpants, she said. Hide Caption 15 of 23

Photos: The evolution of 'Mad Men' fashion The first half of the seventh and final season debuted in April 2014 and covered the first half of 1969. With wild cravats, bolero ties, daisy brooches and fringed jackets, these advertisers are suiting up like the creatives of the late '60s, Przybyszewski said. "If you're in a creative field, you have to dress creatively," she said of this promotional photo. "These guys are living it." Hide Caption 16 of 23

Photos: The evolution of 'Mad Men' fashion Colors have become more prominent and fabrics reflect a turn toward the synthetic. By 1969, Edwardian-style outfits for men -- with double-breasted suit jackets and patterned pants -- had come into fashion. Hide Caption 17 of 23

Photos: The evolution of 'Mad Men' fashion In this promotional photo for the seventh season, Joan opts out of the "it dress" of the 1960s: a mini-skirted A-line that "made everyone look stumpy," Przybyszewski said. In order to carry off the look of the day, many women lost weight to emulate models like Twiggy, she said. Hide Caption 18 of 23

Photos: The evolution of 'Mad Men' fashion The Francis family shows off some fancy traveling duds in this promotional photo for the seventh season. Notice that the boys are wearing sneakers, but they're also wearing a vest and tie, she said. Sally's style is fashion-forward but still formal and appropriate for airplane travel at the time. Hide Caption 19 of 23

Photos: The evolution of 'Mad Men' fashion Don and Megan Draper show up to the airport in fashionably bright colors in this promotional photo for the seventh season. While researching 1960s fashion, Przybyszewski was surprised to find that women's dresses in the late 1960s could be even shorter than Megan's. The money spent on tights and pantyhose worn with these dresses was "mind-boggling," she said. Hide Caption 20 of 23

Photos: The evolution of 'Mad Men' fashion Roger Sterling (John Slattery) and Joan Harris (Christina Hendricks) dress casually -- for the times -- for an outdoor party. Hide Caption 21 of 23

Photos: The evolution of 'Mad Men' fashion January Jones as Betty Francis wears a flowing dress in a season 7 promotional photo. Hide Caption 22 of 23