Order your Open ended GT2 Timing Belt at you desired length. Each piece is for 1m (39.37in). If you order 5 pcs you'll get 5m in one length.
Eg. For the Prusa Mendel you would need 1.8m, and you should order 2 pcs (2m). The belts are easily cut to the required length.
1 840mm×5mm T2 pitch timing belt Belt Y axis 1 900mm×5mm T2 pitch timing belt Belt X axis
P = 2mm, H1 = 1.3mm, H = 0.7mm, 6mm width