What brand cardigan does Tom Selleck wear on blue bloods?

While Tom Selleck's character, Frank Reagan, doesn't wear any specific brand cardigans on Blue Bloods, there's a good reason for that!

The costume designers choose classic, timeless pieces that represent Frank's conservative and traditional style. They likely avoid specific brands to keep the focus on the character and his personality, rather than on a particular label.

If you're looking for similar cardigans, you can find them at various stores like Brooks Brothers, J. Crew, Banana Republic, or even department stores that offer a wide range of classic styles.