Marble City Glassworks has this Sky Blue Window Suncatcher Ornament Hand Blown Glass Pond Float which will work just fine in your window if you don't happen to have a pond. More stuff on their website and blogspot.
Karen Faulkner makes this beautiful Sailing Away sky blue watercolor flower giclee fine art print on archival paper. See more of her watercolor prints at karenfaulknerart or visit her bloodspot to learn more about her inspiration and see additional work.
The featured item in this blue sky collection is this white & sky blue turks head knot sailor rope bracelet offered here in a medium size but available in both smaller and larger sizes by request. See more of these in the blended colors section of my Etsy shop or stop by blended colors on Zibbet for a wider selection of colors and styles.