The 2014 Tumblr trailblazers looked to the ’90s grunge scene for inspiration. Flannels, slip dresses, vintage band tees, polaroids and the ever-beloved Doc Marten boots were hallmarks of the epoch.

The Tumblr girl resurrection has subtle changes from its 2014 origins. According to Hailie Barber, a style influencer, “A lot of key pieces of that style have become a closet staple for ...