It shipped from the east coast in America on a Monday and arrived at my place in Canada in the west coast on the Friday of the same week. Turning off the personalised advertising setting won’t stop you from seeing Etsy ads, but it may make the ads you see less relevant or more repetitive. Etsy’s 100% renewable electricity commitment includes the electricity used by the data centres that host Etsy. According to Nielsen year-end report, Fine Line was the fifth-best selling album of the year in pure sales, with 458,000 copies—of which 354,000 were physical copies.

Larson of Pitchfork described the "actual sound" of Fine Line as "incredible" as Styles' influences permeate the record, but considered his songwriting shallow and lacking in imagination. Supported by five singles—"Lights Up", "Adore You", "Falling", "Watermelon Sugar" and "Golden"—Fine Line debuted at number three on the UK Albums Chart and number one on the Billboard 200, making it Styles' second consecutive number-one album in the US. In an interview with Rolling Stone released on 26 August 2019, it was reported that the singer was putting the "final touches" on his album which Styles explained was "all about having sex and feeling sad.

Lights Up", the lead single from the album, was released on 11 October 2019, debuting at number 3 on the UK Singles Chart. The record has been described as pop rock, with elements of progressive-pop, psychedelic pop, folk, soul, funk and indie pop.

Alexandra Pollard of The Independent stated that "it may not reach the pinnacle of sex or sadness, but Fine Line is a fine album nonetheless. Rea McNamara of NOW Magazine praised Styles' decision to lean towards "ebullient, soulful pop" while naming "Sunflower, Vol. Additionally, it peaked at number one in the US, making it his first number one single in the country. The album had the third-largest sales week of 2019 in the US and broke the record as the biggest debut from a British male artist since Nielsen SoundScan began, earning 478,000 album-equivalent units. At Metacritic, which assigns a normalized rating out of 100 to reviews from professional critics, the album has an average score of 76 out of 100, based on 20 reviews.Leading up to the album's release, on 10 December, Styles also served as the guest host on The Late Late Show with James Corden. The album cover features Styles wearing a "hot fuchsia" silk blouse, a scoop-neck vest, and white trousers. Gregory Robinson, writing for The Guardian, regarded the album as "confident, convincing and catchy. To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. On 15 February 2022, the album was certified triple platinum by the Recording Industry Association of America (RIAA) for combined sales and album-equivalent units of three million units in the United States.