Kim Kardashian has a lot to show off these days -- starting with her enviable figure and one very large diamond ring!

The reality star posted yet another revealing shot on Twitter the other day, this time flaunting her tight tummy in a low-riding pair of sweatpants and a sports bra.

“I’m hoping to slim down a little bit, and I’m not afraid to say it,” Kim recently told Life & Style ... and apparently, whatever she's doing is working!

Kardashian had reportedly gained 15-20 pounds since she started dating Kanye West.

Speaking of Kanye ... Kim sparked engagement rumors yesterday when she stepped out wearing a huge diamond ring.

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Though she was seen with the large sparkler on her right hand pinky finger, gossip still ran rampant online. A E! source says they're not engaged.

Check out more of Kim's most revealing TwitPics in the gallery above.

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