I have an old Settlers of Catan set that didn't come with the border, which didn't affect me until I got an expansion pack for Christmas. I came up with this piece to fill in the gaps with my Seafarer's expansion, but you can replace your current border with 6 of these as well. They fit great and you can probably modify with shark/skull/you-name-it cut-outs to personalize your board. Enjoy!