It's best to use Adobe Illustrator to design stuff
Fuji Coasters: W101 mm x L101 mm
Fuji Coaster with circle in the middle (W68mm x L68mm)
Fuji Placemats
10x8 Slates
12x10 Slates
Keyrings
Cushion's
Small teddy t-shirt (4L x 3W)
Mugs