23 x 16.5 cm postage costs royal mail

According to Royal Mail's size and weight guide, a parcel with dimensions of 23 cm x 16.5 cm would be classified as a "Large Letter" or "Large Parcel" depending on its weight.

Here are the estimated postage costs for a parcel with these dimensions:

Large Letter (up to 20 cm x 23 cm x 5 cm)

• Weight: Up to 100g
  • 1st Class Large Letter: £1.15
  • 2nd Class Large Letter: £0.85
• Weight: 101g-100g
  • 1st Class Large Letter: £1.35
  • 2nd Class Large Letter: £1.05

Large Parcel (23 cm x 16.5 cm x 5 cm)

• Weight: Up to 750g
  • 1st Class Large Parcel: £3.45
  • 2nd Class Large Parcel: £2.45
• Weight: 751g-1kg
  • 1st Class Large Parcel: £4.45
  • 2nd Class Large Parcel: £3.45

Please note that these prices are subject to change and may vary depending on your location, the service you choose, and any additional services you require (e.g. tracking, signature on delivery). It's always best to check the Royal Mail website or consult with a post office for the most up-to-date pricing information.