413. 7-1/2" long, as seen in the first photo
414. 4" long at the base, this is another small project that I made the other day, though one important part of it is not in the picture. The missing piece is a very common object, there is a good chance that there's a similar one very close to you right now.
415. 9-1/2" long
416. 10-1/4" long
417. 11-1/2" long