The TV star was accompanied by a male friend while he visited Levinson Jewellers in downtown Fort Lauderdale in Florida, reported Ace Showbiz.
"Scott was most definitely shopping for engagement rings. And all of them were large! Scott and his friend looked at a whole selection of amazing rings, all diamond, all different cuts, sizes, settings - he certainly is taking his time and wants to make the right purchase," a source said.
Disick and Kourtney began dating in 2007. Kourtney gave birth to Mason in 2009 and Penelope in 2012.
Another member of Kardashian clan was also reported to be engaged earlier this week. On October 24, Kim Kardashian was spotted wearing a huge ring on her pinky finger.
It was rumoured that the ring was her engagement ring from boyfriend Kanye West, but the report was denied.