By Stephen Nakrosis

Shares of online personal shopping and styling service Stitch Fix Inc. are trading higher after hours Tuesday, following the release of fourth-quarter and full-year financial results that showed the company reaching $2 billion in annual sales for the first time.

The company also introduced its Stitch Fix Freestyle offering, which allows customers to order merchandise directly from the company without a Fix.

At 5:30 p.m., the company's shares were trading 13.23% higher, at $40.15 a share. Volume at the time topped 2.4 million shares.

The company's stock finished the day's regular session with a 2.5% loss, closing at $35.46 a share.

Write to Stephen Nakrosis at stephen.nakrosis@wsj.com