See Every Kardashian and Jenner Engagement Ring: From Kim’s 20-Carat Rock to Kourtney’s Custom Oval Diamond

In addition to the confirmed engagement rings they’ve shown off, several members of the family have sported enormous diamonds on that finger throughout the years without a known engagement, leading fans to speculate about several potential proposals.

From Kim’s three different diamond sparklers“I didn’t expect this at all,” Kim told PEOPLE at the time. “I was in such shock. I never thought it would happen at home, and I never thought now.”

Of the ring, Humphries said: “I just knew I wanted it to be big.”

The basketball player added a few sentimental touches as well, inscribing the piece with two Bible verses.

“There’s one verse [Proverbs 31: 10-31] about the perfect godly woman,” he told PEOPLE. “The other, [1 John 3:18] is about love. It took me … a few days to pick them out and research the perfect ones.” A third inscription, “K [hearts] K,” finished off the custom ring.

The couple tied the knot on Aug. 20, 2011, though their union