This one is our most frequently asked question and depends on the circumstances under which the mat will be used. For those looking for a caravan annex mat, the most effective way of determining the best size is to measure the length of your awning.We’ve put together this guide for you, but we recommend you do measure before you place your order.An approximate guide:10 ft – 12 ft awning = 3m mat13 ft – 16 ft awning = 4m mat17 ft – 20 ft awning = 5m mat20 ft + awning         = 6m matMost awnings are 2.4m wide, and therefore, so too are our mats. Note the above-recommended sizes are based on the length of your awning, NOT the full length of your caravan.