Price per length 
Douglas Fir Tongue & Groove cladding. Ideal for summer houses, sheds, stables etc.  It can be used for internal or external fitting. Ends are T&G.
Each plank measures 145mm x 23mm (125 mm after fitting) and comes in various lengths and profiles.
 
FAQ:
To calculate how many boards you need: Calculate the square metre amount you require (height x width), then divide it by:
0.35 for 2.8m boards
0.3525 for 2.9m boards
0.3687 for 2.95m Boards
0.375 for 3m boards
Example: 40 sqm / 0.375 = 107 boards (3m)