Not only does she have to wear extra large trousers, the mother of two measures an impressive 7ft in diameter and sometimes proves too large to fit through doorways.
But despite being proud of her record-breaking rear end, Ms Massey admits that living with a super-sized bottom isn’t always easy.
‘Everyday I get some kind of comment thrown at me, both good and bad – I used to be ashamed but now I hold my head high,’ she revealed.
‘At school I was teased and called Dump Truck b*tt by the other kids, but the condition is hereditary – there’s nothing I can do about it.
‘I went through a stage of worrying what people think, but now I want to show the world I am proud to be me.’
Ms Massey doesn’t her size get to her as she is so proud of her unique physique, she even takes part in risque photo shoots for fans of her figure.
‘Some people can’t believe one person can have this much b*tt,’ she adds. ‘Because I’ve got a relatively small frame on top they say, “that can’t be real”.
‘I carry this weight with me all the time, everywhere I go, it’s definitely not fake. Big booty’s are just in my blood.’
Sarah says she find it hard getting clothes of her size ‘Because of my size I can’t ever find outfits in normal stores. My top half is a 7XL and my bottom half is 10XL so I have to go to specialists.
‘I buy most of my clothes online because there are few plus-size stores with big enough clothes. Larger outfits are expensive so I can spend up to £400 per month on clothes.’
She said her problems don’t end with finding clothes, she also finds it difficult to perform even the most basic chores.
‘With most doorways I have to go in sideways – I do the little wiggle dance to get through,’ she explained.
‘I’ve broken chairs before and I once broke a toilet bowl I was sat on at the theatre – it was awful.’
However, now Sarah is taking steps to tackle her mobility issues with workout sessions to help her lose weight.
‘Although I love my b*tt I would like to make it just a little bit smaller,’ she confessed. ‘The size that it is causes back problems- even sitting down on a chair can be painful.’
Despite the negative comments and difficulties fitting through the door and into regular clothes, Sarah says she has no regrets and hopes to inspire other women.
‘I’m trying to make the most of what I’ve been given and being confident about who I am makes me happy, If I can inspire others to embrace their curves and be proud big, beautiful women, I would be very happy.’