Mimi G shows sewists how to re-create major fashion trends, like statement sleeves, at home. Mimi G/Getty Images Mimi G is a prominent sewing influencer with millions of followers across social media.

Mimi G had a vision in her head. The DIY fashion mogul, who runs a popular lifestyle blog and online sewing school, was tired of rifling through piles of bolts at cluttered, musty fabric stores. She ...