Make pages on Facebook, Instagram, and other social media sites for your t-shirt business. This is a free marketing tool that can spread the word to family, friends, and acquaintances that you have a business. Post updates on and photos of your t-shirts regularly to get and keep the interest of potential buyers. once business picks up. Many of the most successful online t-shirt sellers have profited immensely from advertising on Facebook. While it can cost quite a bit of money, it may make you a lot more if you're already selling a lot of shirts. Invest in Facebook ads so that people who don't know you or your business see your t-shirts while they're scrolling through their news feeds. To make an ad on Facebook, go to https://www.facebook.com/business/products/ads and click on “Create an Ad.” In addition to online advertising, you can spread the word about your t-shirts out in your community. Put up flyers around town and/or hand out business cards to advertise your business locally and share it with others face-to-face.

Summary:
Make social media accounts for your t-shirt business. Pay for Facebook ads Spread the word locally with business cards and flyers.