Published: 03.30.2021.
Noah’s Ark was a regular-sized ship. Its dimensions were 300 * 50 * 30 cubits. If we take a standard cubit (457 mm)1 as the measure, it would be 137.1 * 22.85 * 13.71 m. Here we compare the length and the breadth of the Ark to some modern and historical ships.

CP 2064, a S-2000 class Italian Coast Guard boat
Length: 12,31 bis 13,7 m
Breadth: 3,6 bis 3,76 m

CP 902, Diciottio-class Italian Coast Guard patrol ship
Length: 51,7 m
Breadth (beam): 8,10 m

Santa Maria, the larger one of Columbus’ three ships
Length: 24 m
Breadth: 8 m
(measurements uncertain)

Wyoming, largest wooden ship in modern times
Length: 137,2 m
Breadth: 15,2 m

Noah’s Ark
Length: 137,1 m
Breadth: 22,85 m
Height: 13,71 m

MSC Don Giovanni, Panaman freighter
Length: 202,8 m
Breadth: 30,6 m

RMS Titanic
Length: 269,04 m
Breadth: 28,19 m

Ovation of the Seas, cruise ship from the Bahamas
Length: 348,00 m
Breadth: 41,20 m

USS Nimitz (CVN-60), aircraft carrier
Length: 332,85 m on deck
Breadth: 76,80 m on deck
Footnote:
1: https://www.britannica.com/science/cubit
Image sources:
Ark replica, Santa Maria replica, MSC Don Giovanni, Ovation of the Seas, USS Nimitz: CC0 from Pixabay
Wyoming, Titanic: Public Domain images from Wikipedia, taken from their respective German Wikipedia sites
CP 2064: https://it.wikipedia.org/wiki/File:Motovedetta_a_Capri.jpg, licensed under Creative Commons Attribution 2.0 Generic (CC BY 2.0)
CP 902: https://commons.wikimedia.org/wiki/File:CP-902-Aug2008.jpg, licensed under Creative Commons Attribution 3.0 Unported (CC BY 3.0) Author: A. Deliggianis