Hi @Irene D it depends a bit on the context. I see in a previous thread you had a reading of 17.9mmol/L so I'd say that compared to that it's good.
Depending on when you took it (eg a non diabetic might go that high just after eating something very carby, plus meters aren't that accurate) it might be good or not so good. (Most non diabetics would stay under 10 most of the time). The link below might be useful.
Normal blood sugar ranges and blood sugar ranges for adults and children with type 1 diabetes, type 2 diabetes and blood sugar ranges to determine diabetes.