This 30 power loupe is a good, inexpensive magnifier. It features a 21 mm single thick glass lens with a wide field of view.
Extended size is a compact 2-3/8" x 1" x ¾", folds to 1-3/8" long (approx.) Style may vary slightly from photo. Plastic case is included.
I love this item
Very easy to use and these come in a very nice storage case!