Every Letter I Sent You

Every Letter I Sent You is the first studio album and the first double album by South Korean singer-songwriter and record producer Yerin Baek. It was released through Blue Vinyl and published by Dreamus on December 10, 2019. It features 18 tracks, with "Popo (How Deep Is Our Love?)", "0310" and "Square (2017)" simultaneously released as the album's three singles. The physical album comes in a CD and LP format.

This is her first release under her new label, Blue Vinyl, after leaving JYP Entertainment in September 2019.

Every Letter I Sent You was met with generally positive reviews from music critics and debuted at number two in South Korea, selling over 35,000 copies. The album received nominations for Album of the Year at 12th Melon Music Awards, while its single "Square (2017)" won Best R&B/Soul award, and was also nominated for Song of the Year award.