Based on film depiction

Photo from Wikimedia Commons
Vorpal Sword
The snicker-snack blade from Lewis Carroll's Jabberwocky/Pop Culture
The Vorpal Sword appears in Lewis Carroll's 1871 poem 'Jabberwocky' (from Through the Looking-Glass) as the weapon used to slay the fearsome Jabberwock. Carroll never specified dimensions, but in Tim Burton's 2010 Alice in Wonderland, the Vorpal Sword was depicted as a longsword roughly 1.2 m long. In Dungeons & Dragons, where it became a legendary magic item, a vorpal sword is typically a longsword or greatsword. Based on typical fantasy longsword depictions, measurements follow a standard medieval longsword.
Measurements
Total length1.2 m
80Blueberry diameters
706 trillionProton diameters
4Ant hill heights
Blade length9.5 tenths m
1.2 tenthsSailboat lengths
4.3 thousandthsHoover Dam heights
664 quadrillionthsSaturn orbit radii
Long enough to behead a Jabberwock
Hilt length2.5 tenths m
3.5 thousandthsBoeing 747 lengths
564 millionthsEmpire State Buildings
909 millionWater molecules
Two-handed grip
Mass1.6 kg
109 billionthsBrooklyn Bridge masses
1.6 millionGrains of sand
Typical longsword weight
Blade width5 hundredths m
1.6 tenthsSubway Footlongs
5 tenthsPine cone lengths
At the crossguard