The dresses are both size three (even though the one on the right looks shorter, it's just blowing in the breeze) and I think they are going to look adorable together. Since Spenser's chance of having a sister are zero to none, Olivia is probably the closest she's ever gonna get.
(Oh, Carter ended up running the mile yesterday and Taylor ran the 800 meter. It was a long but fun day. We spent six hours in the cold, very windy, damp weather. By 2:30 p.m., I was done. More so than Spenser and Sawyer. And my back is not good today from all that standing and unsupported sitting and carrying kids and bags. I start physical therapy on Wednesday. Thank goodness.)
Edited to add: The tags in the dresses are iron-on from here. (I think.)