pattern is adaptable in size but does not give specific stitch counts.
Tried it with 60 sts across head = about 30 cm.
Knit additional short - rows every 10th garter ridge

marking it medium due to language only - the pattern is not written by an english native speaker and thus is at times more obscure than necessary. If one knows what to do it is a very easy and straightforward knit resultling in a very pretty, timeless bonnet.

Next time I would try to shift the decrease points a bit inward, maybe by excluding the garter border from the stitch count to be divided…