When Sir Elton John says he’s downsizing, he means business.

Who else, when they’re Marie Kondo-ing their home, would have a pair of silver platform boots, a grand piano and a triptych by street artist Banksy in their collection?

The singer is bringing some of his iconic memorabilia to auction, with Christie’s presenting memorabilia from his former Atlanta home which sold for US$7.2 million (NZ$11.5 million) last year.

Beginning on February 21, the series will be comprised of eight sales in total (both live and online), under the banner The Collection of Sir Elton John: Goodbye, Peachtree Road.

“It may not be everyone’s taste, but it’s certainly my taste,” Sir Elton said.

“My apartment in Atlanta was like my man cave, full of things that I loved, mementos from everywhere in the world, things that gave me inspiration every day.”

The apartment at Peachtree Rd was five flats knocked into one, covering 13,500 sq feet. He moved into the property in 1992.

David Furnish, Sir Elton’s husband, told the New York Times: “Atlanta opened this odyssey for Elton as a collector because, prior to getting sober, he had completely emptied out his main home in Windsor and sold the contents. So he was starting with a clean slate.”

The vast collection features a range from flamboyant stage costumes and Versace velvet chairs to art and photography.

A pair of silver platform boots, with the initials 'E' and 'J'.

One of the sales is titled Out of the Closet and features a pair of monogrammed silver leather platform boots, decorated with the initials ‘E’ and ‘J’. They have a top estimate of US$10,000 (NZ$16,000).

Damien Hirst’s Your Song — signed and inscribed with a note to Sir Elton and Furnish has an estimated value of US$350,000 to $450,000 (NZ$561,000 to $721,000).

The most expensive piece on offer, Flower Thrower Triptych, a 2017 Banksy painting of a masked man hurling a bouquet of flowers — that’ll set you back a cool US$1.5 million (NZ$2.4 million).

Other lots include a 1990 Bentley Continental convertible with black leather interior — estimated between US$25,000 to $35,000 (NZ$40,000 to $56,0000), which Sir Elton described as “one of the most beautiful cars of all time”.

There are more than 100 Versace silk shirts in the sale.

There are more than 100 Versace silk shirts in the sale.

“I just loved them, with their amazing patterns,” Sir Elton said. “I never wore half of them — I just wanted to hang them. It was like an art installation with shirts.”

Furnish said that the star could part with more of his possessions as he steps back from performing to spend more time with their sons, Elijah and Zachary.

“That could mean more sales, gifts to institutions, gifts to friends,” he said. “As our sons get older, they might have connections to pieces. We need to elegantly find a way of bringing them into that process.

“There’s very much a little piece of Elton’s soul in every single item,” Furnish said. “Buyers of these pieces are going home with something that has, without question, inspired Elton in his artistic journey.”

Prescription sunglasses by Sir Winston Eyeware that Elton John owned.

At the slightly cheaper end of the scale, a pair of prescription sunglasses by Sir Winston Eyewear has an estimate between US$2000-$3000 (NZ$3205 to $4808).

“It is a distinct privilege for Christie’s to partner with Sir Elton John and his husband David Furnish in curating the forthcoming auction: The Collection of Sir Elton John: Goodbye Peachtree Road,” Tash Perrin, deputy chairman, Christie’s Americas, said in a press release.

Elton John's black convertible 1990 Bentley Continental.

The auctioning is set to bring in a whopping US$10 million (NZ$16 million) with Sir Elton’s Yamaha conservatory grand piano being estimated to cost a maximum of $50,000 (NZ$80,000).

The grand piano kept in the conservatory of Sir Elton’s Atlanta home is going under the hammer.

“As time went on, the walls got more full,” Furnish said as he spoke of the belongings in their home.

“Elton never put things in drawers, he bought them to live with his art.”

According to Christie’s, a public exhibition in their galleries in New York City will take place from February 9-21.