There are rolling trays, there are really large rolling trays, and there's the Skinny Tray. 
With 39x29.5 cm and a rolling rail length of 35.5 cm, this tray superlatives everything even the advanced roller could dream off. 
The Skinny Tray also includes 2 metal storage tins with various designs. for safe custody of the rolling materials.

Buy the product here 

skinny tray