medium
The German word 'mittelgroß' is an adjective that directly translates to 'medium' in English. It is used to describe something that is neither large nor small, but of average size. For example, a 'mittelgroße' Pizza is a pizza of medium size.
The dog is medium-sized.
In this sentence, 'mittelgroß' is used to describe the size of the dog. In German, adjectives are often placed before the noun they describe, similar to English.
The medium-sized bag is blue.
Here, 'mittelgroß' is an adjective describing the bag. Note that the adjective endings can change depending on the gender, case, and number of the noun.
I am drinking a medium-sized coffee.
In this example, 'mittelgroß' describes the size of the coffee. When ordering food or drinks, sizes are often described as 'klein' (small), 'mittelgroß' (medium), and 'groß' (large).