6 Sposoeasy XS, 12 BG 3.0 xs, 3 Magicalls S (I do NOT like these diapers), one chunky monkey aio. And the diapers in the right photo are all made by me: One daribums aio (not a fan of this pattern), one trimsies aio (LOVE this pattern), 3 fitteds.
Covers: 8 Bummis XS Superbites, two thirsties duo stage 1, Peas and carrots set preemie sized from olive janes. Wool: Longies from top to bottom: Dragonfly longies crocheted by me with pattern from here, two pairs of NB longies with Mosaic moon woodland tale and birthday boy colorways, knit by Mary's Little Knits. Blue/grey pair by HappyBumBaby, and the last pair I bought used and have no clue where they came from. Sock monkey longies hooked by Mr. And Mrs. Wooly Pants, sage green shorties crocheted by me with the honeysuckle soaker pattern from Here, and two unknown preemie soakers sent to me from a friend of mine.
Also, not pictured were a dozen WAHM preemie fitteds. We used these for about a month.
Now that I am through the NB stage, here is what I would recommend as a great nb stash for twins:
36 XS aios (both BG and sposoeasy are great)
12 fitteds (I liked all of them except the KL0s, these were not great for us)
6 wool covers
diaper sprayer (although poop from EBF babies can go straight in the wash)
Two wet bags
4 dozen cloth wipes and wipes solution