Royal mail 2nd class parcel dimensions

According to Royal Mail's website, the maximum dimensions for a 2nd Class parcel are:

Additionally, the maximum weight for a 2nd Class parcel is 2 kg (4.4 lbs).

It's worth noting that Royal Mail also has a "Large Letter" service, which has different dimensions and weight limits. For a Large Letter, the maximum dimensions are:

And the maximum weight is 100g (3.5 oz).

If your parcel exceeds these dimensions or weight limits, you may need to use a different service, such as 1st Class or Special Delivery. It's always a good idea to check with Royal Mail or their website for the most up-to-date information on parcel dimensions and weight limits.