silmellä
Silmellä is a Finnish word that translates to "by eye" or "by sight" in English. It describes a method of estimation or measurement performed without the aid of any tools or instruments. Instead, one relies on their visual judgment and experience to determine a quantity, distance, or size. This practice is common in various everyday situations, from estimating the amount of ingredients needed for cooking to judging the distance to an object.
The accuracy of silmellä estimation depends heavily on the individual's experience and familiarity with the subject