Pebble today updated its smart watch lineup with its first-ever smart watch that includes a round face, the Pebble Time Round. The new watch is an iteration of its existing Pebble Time device, which first debuted on Kickstarter earlier this year.

Pebble says its new round smart watch is the "thinnest and lightest smart watch in the world," measuring in at 7.5mm thick and weighing 28 grams. Comparatively, the Apple Watch is 10.5mm thick with weights between 25 grams (38mm Apple Watch Sport) and 69 grams (Gold Edition Apple Watch).

The Pebble Time Round is available in Black, Silver, and for the first time, Rose Gold, with band sizes of 20mm or 14mm. Pebble plans to sell several quick-change leather bands for the watch, with metal band options to come later in 2015.

While the Pebble Time's battery lasted for seven days and the Pebble Time Steel had a 10 day battery life, the small size of the Pebble Time Round means more frequent charging is required. Battery life is around two days, but there is a quick-charge battery option that gives a day of power in 15 minutes.

Like all of the Pebble watches, the Pebble Time Round includes an e-paper screen, but it does not offer full water resistance, with Pebble instead stating that it's able to withstand splashes.

Customers who ordered a Pebble Time Steel have an option to purchase a Pebble Time Round at a $50 discount. Customers can keep both watches or use the Pebble Time Round on a trial basis, returning one of the two watches at the end of 30 days for a full refund.

The Pebble Time Round can be pre-ordered from Pebble.com beginning today for $249. It will ship out in the United States in early November, expanding to the UK later in 2015 and other EU retailers in early 2016.