Someone's ready for summer! 

Kim Kardashian posted another revealing Instagram snap on Wednesday, showing off her abs in a black bikini.

"Quick swim before the Dash party," she captioned the sexy photo. We gotta say, Kim definitely has her pre-baby body back -- just look at her tight tummy!

The 33-year-old wasn't the only "Keeping Up with the Kardashians" star showing off her bikini body, though.

Kim's younger sister, Kylie Jennerposted a pool snap on Wednesday as well ... wearing the exact same swimsuit! 

Looks like the famous family members have similar taste when it comes to bathing suits! 

How do you think the reality stars look in their matching bikinis? Tell toofab in the comment section below and click "Launch Gallery" above to see even more of Kim's sexy TwitPics!

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