Very small (ideal for small children's faces), resulting in it not easily adjusting to the eyes and therefore making it difficult to focus. Not to mention that it makes you dizzy... (due to the size and difficulty of focusing). I do not recommend it.

Small size, the most compact in its category. On the right eyepiece there is an adjustment for in-out adaptation to the eye, in the center is the focus wheel. 25 years warranty (!!) from the manufacturer (stated in the manual-warranty card). It is a budget option and the product is of good quality. Buy it at a price lower than at least 50 euros to be considered a value for money purchase (I couldn't find any other small-sized alternative here for a while, so I bought it for about 60 euros).

Without any particular experience in glasses, they satisfied me. They are worth their money. Easy to use. Small size.