Hexagonal Graph Paper Notebook: Organic Chemistry Notebook Hexagon Graph Grid Paper – 100 Pages, 1/4 Inch Hexagons (Works With Organic Chemistry ... & Chemistry Lab Notebook Gifts (Vol 1)

If the exact dimensions are important, look elsewhere. The hexagons are 3/8ths inch from side to side and 3/16ths on a side and about 7/16ths from corner to opposite corner. The grid lines are somewhat pixilated.