Medium parcel royal mail size

According to Royal Mail's website, a Medium parcel is defined as a parcel that measures between 35.5cm x 24.5cm x 16.5cm (14" x 9.6" x 6.5") and 45.5cm x 24.5cm x 16.5cm (18" x 9.6" x 6.5").

Here are the exact dimensions for a Medium parcel:

Please note that these dimensions are subject to change, and it's always best to check with Royal Mail's website or a local post office for the most up-to-date information.