It's about 0.000000000000003 times as big as an Halley's Comet.
In other words, 265.8 jiggers is 0.0000000000000029 times the size of an Halley's Comet, and the size of an Halley's Comet is 340,000,000,000,000.0 times that amount.(Comet Halley, officially "1P/Halley") (volume calculated based on 2005 dimensions)
Halley's Comet, the famous comet visible to observers on Earth approximately every 76 years, has a peanut- or potato-shaped nucleus made of rock, dust, ice, and various frozen gasses. The nucleus measures approximately 15 km by 8 km by 8 km, which yields a calculated volume of 91,000,000,000,000,000.0 jiggers. The coma of the Comet — the trail of sublimated gasses that give the Comet its visibility — may be up to 100,000 km in length.
It's about 0.000000000000003 times as big as The Grand Canyon.
In other words, 265.8 jiggers is 0.00000000000000283 times the size of The Grand Canyon, and the size of The Grand Canyon is 353,000,000,000,000.0 times that amount.(Coconino County and Mohave Counties, Arizona, near Fredonia and Grand Canyon, Arizona)
A dynamic and continuously changing landscape, the Grand Canyon has an approximate volume of 94,000,000,000,000,000.0 jiggers. The strata of the rock visible in the Canyon's walls display nearly 2 billion years of geological history.
It's about 0.000000000000000000009 times as big as Earth's Oceans.
In other words, 265.8 jiggers is 0.0000000000000000000084 times the size of Earth's Oceans, and the size of Earth's Oceans is 120,000,000,000,000,000,000.0 times that amount.(Total water volume of Atlantic, Pacific, Indian, Arctic, and Southern Oceans) (estimated)
Over 97% of the Earth's water is found in the planet's five oceans for a total volume of about 32,000,000,000,000,000,000,000.0 jiggers. The Pacific Ocean is the largest ocean, covering 165,760,000 sq. km — more than double the area of the Atlantic Ocean at 82,400,000 sq. km.
It's about 0.000000000000000005 times as big as The Gulf of Mexico.
In other words, 265.8 jiggers is 0.000000000000000004844 times the size of The Gulf of Mexico, and the size of The Gulf of Mexico is 206,400,000,000,000,000.0 times that amount.(water volume)
The Gulf of Mexico contains 54,870,000,000,000,000,000.0 jiggers of water. Every second, the Mississippi River empties 270,500,000 jiggers of water into the Gulf.