For a completely distinct and unique memo pad, there's the Kizara Wood Sheet Memo Pad. 

FEATURES

• Soft pages
• Crafted from a single piece of wood
• Wood grains are incorporated into every page
• Each page is different with a slight variation in thickness 
• Recommended for use with rollerball pens 
• Avoid use of pencils 
• Sustainably sourced wood

MATERIALS

• Kizara wood from pine trees 

SPECS

• Sheet thickness: 0.15 to 0.25 mm 

Dimensions: 

• Small - 3" x 4" (7.6 x 10.1 cm)
  
• Medium - 4" x 6" (10.1 x 15.2 cm) 
  
• Large - 5" x 7.2" (12.7 x 18.5 cm)
  

COUNTRY OF ORIGIN
Japan