Letter

     Length: 240mm max
     Width: 165mm max
     Thickness: 5mm max

Weight range	Second Class at new prices
0-100g	30p

Large letter

     Length: 353mm max
    Width: 250mm max
     Thickness: 25mm max

     Length: over 353mm
     Width: over 250mm
     Thickness: over 25mm

Please note the maximum weight limit for Second Class items is 1000g

Find out How to buy Second Class