1 Pack-lego Compatible X-large Dark Grey Baseplate, Building Base Plate, 50x50 Studs (15x15"), Bigger Than Lego 48x48 (10701) and Lego 32x32 (10699)" : Amazon.co.uk: Toys & Games
LEGO Classic Large Creative Brick Box 10698 : Amazon.sg: Toys
Amazon.com: LEGO Classic Sand Baseplate : Toys & Games