This is how Jasmine costumes have changed over the years.

Picture Year As seen at Notes
November 25, 1992 - September 5, 2016 Based on the 1992 version albeit with a gold headband, waistline, and shoes and her sleeves unattached to her bra which has thin straps and a blue emerald on it.
Jasmine new look
2015, September 2, 2016 - present Walt Disney World's Magic Kingdom Jasmine sports a new dress with her sleeves covering her arms, her bodice covering her stomach, and her long skirt covering her pants. Also, like her animated version, she now has a cyan headband and shoes.

This costume actually debuted in Disney's D23 Expo in Japan in 2015.