Our Kiln Dried Birch Logs fit most wood burning stoves, pizza ovens and firepits. Within the bag you will get a mixture of log widths which are all up to a maximum 25cm (10inches) in length. All our logs have been kiln dried to below 18% moisture content which will give you a long slow burn with maximum heat output and low emissions. One Tree Planted with every order. Ready to Burn certified the UK Government stamp for firewood. Sustainably Sourced Low moisture content less than 18% Sourced from FSC approved sustainable woodlands Approx Length of Logs: 25cm (10 inches) Approx Diameter of Logs: 5-15cm  Express Delivery 1-2 working days Approx weight per box: 8kg