I love matching sibling sets, and will put them on my kids as long as they'll let me. Here's what they'll be wearing for Christmas this year, though hopefully looking a little more polished for the big day, with a dress shirt and maybe even, I dunno, combed hair.
The dress pattern is my own Ultra Twirly Tiered Tee Dress, available for download from my etsy shop, and the adorable matching tie pattern from PatchworKids is available at www.youcanmakethis.com
And ... JOY! Next year I can add a matching appliqued onesie, too.