Using figures Chelsea quoted in interviews and on her website, we can piece together a rough timeline for her growth.

For the first few years her growth was completely unrestrained. There was no known way to limit the growth aside from removing the implants.

At some point a doctor of hers developed a procedure based on liposuction to drain her breasts of some of the fluid they were producing and reduce their size, temporarily halting and reversing the growth. I haven’t been able to find a date for when she first started getting drained.

But despite getting intermittent drains to reduce her size and to try to limit the growth, her breasts still gradually trended upwards in size as her skin was getting stretched out, making it easier and faster for them to grow back to their previous maximum.

The sizes and weights are astonishing.

• Original, natural breast size: D cup
• First saline bag augmentation: E cup
• Second, double saline bag per breast augmentation: HH cup
• 1999: Experimental polypropylene implants: 2,500cc of implant material. From this point on she had no further surgeries. All growth occurred from the unexpected “natural” response of her breasts to the polypropylene.
• 2002: 7000cc (20 pounds / 9kg per breast - nearly 3x their original size. They now measured 53” around the bust.)
• 2005: 10,000cc (26 pounds / 12kg per breast - 4x their original size)
• 2011: Chelsea’s bust measurement was now 65”
• 2012: 15,000cc (31 pounds / 14kg per breast - 6x their original size. She announced in 2012 that her breasts now weighed more than half her original body weight, which is crazy! The measurement around her bust was now 72” - a full 6ft!!! And she wasn’t done growing…)
• 2014: 18,000cc as of summer 2014 (35 pounds / 16kg per breast - over 7x their original size). Chelsea seemed to just let her boobs go for it after this, as she reported that as of December 2014 they were already up to 21,000cc (40 pounds / 18kg per breast - more than 8x their original size). That’s a truly staggering amount of growth in only 6 months.
• 2016: Chelsea’s bust measurement was now 81”
• 2017: Chelsea’s bust measurement was now 85”
• 2020: By the time of her retirement the exact size and weight is unknown, and Chelsea seemed to have given up on even bothering to measure their size and growth. But certainly the sizes were even bigger than ever before! By 2020 she was surely carrying over 40kg - more than 6 stone - in breast weight. Possibly much more.

And remember - all of this is with frequent drains. Without the drains her breasts would have grown MUCH larger… which is hard to imagine!

You can’t really do bra sizes with boobs this large, but assuming her ribcage measurement was about 32” and her bust 85”, her bra size would have been 32ZZZZZZZZZ.