I have once mistaken a ukulele into a guitar. Both have a number 8 body shape though ukuleles are also available in a non-standard shape, such as cutaway shape and an oval, usually called a "pineapple" ukulele. Ukuleles are also smaller and it only has 4 courses of strings. Ukulele is sometimes abbreviated as uke and is actually a member of the lute family of instruments. Some known and good ukulele brands are Alvarez, Alfred, Diamond Head, Hal Leonard and more.