Size 6-12m. Prepped once—hand washed using wool wash, each used maybe once or twice, our baby did not like the bulk of these and we had to switch brands. Disana Wool Pull-On is a natural merino wool 2-layer pull-on diaper cover. An excellent natural, soft, breathable nighttime option. 100% merino wool from organic farming. Made in Germany. Sizes 6-12 months, 74/80 cm (we suggest 12 - 20 lbs) Sizing note - We added our own weight ranges to suggested ages, but do consider age, too. A 20 pound 4 month old is a very different shape and fit than a 20 pound 14 month old. There will be normal and expected shrinkage of the wool over time. However, they will be big at first when they are still new. Wool changes with use. Notice the overlap of weights. Please read instructions provided with your order and see our short instructional videos. You will need a very gentle wool wash to prepare this item for use as a diaper cover. This item has a loose knit and will possibly get pulled threads if used prior to washing. Please inspect carefully before washing; washed items are not returnable. Please do not pull or cut loose threads; this will cause holes. Most loose threads are left loose on purpose in the manufacturing process and will felt up and "lock" naturally with washing. HAND WASH AND AIR DRY ONLY.