Just in case size matters, here are some long and large ships:
N.A.I. Superba class: 381.9 meters / 1,253 feet
Built by Eriksberg Mekaniska Verkstads in Göteborg, Sweden. It was a massive ship with only two ships in it's class.
Emma Mærsk: 397 meters / 1,302 feet
A container ship owned by the A. P. Moller-Maersk Group. When she was launched, Emma Mærsk was the largest container ship ever built. As of 2009 she and her 7 sister ships are the longest container ships constructed and the longest ships currently in use.[1] Officially, Emma Mærsk is able to carry around 11,000 twenty-foot equivalent units (TEU) according to the Maersk company's method of calculating capacity,[2] which, at her introduction into service, was about 1,400 more containers than any other ship is capable of carrying. - wikipedia.org
Esso Atlantic class: 406.6 meters / 1,334 feet
A supertanker that was built in 1977 by Eddsso Eastern Marine.
Batillus class: 414.2 meters / 1,359 feet
The biggest ships by gross tonnage ever constructed were four Batillus-class supertankers built in France at the end of the 1970s, having 555,000 metric tons deadweight (DWT) and a 414-meter length. Built in the Louis Joubert Lock, they were launched from the shipyard Chantiers de l'Atlantique at Saint Nazaire. The only other ship considered by many as larger was the Knock Nevis (ex Jahre Viking, Happy Giant and Seawise Giant) of 1981, which was originally designed with a smaller tonnage than the Batillus class, but had her length and tonnage increased during construction. -wikipedia.org
Knock Nevis: 458.5 m / 1,504 ft
The Knock Nevis is a massive ship, last used as a floating storage and offloading unit (FSO). She was previously a supertanker and was the longest ship ever built, as well as possessing the greatest deadweight tonnage ever recorded. Fully laden, her displacement tonnage was 646,642 tons, the heaviest of any ship of any kind. For these reasons she was generally considered the largest ship ever built.-wikipedia.org
"With Ships the Sea was Sprinkled Far and Nigh,"
With ships the sea was sprinkled far and nigh,
Like stars in heaven, and joyously it showed;
Some lying fast at anchor in the road,
Some veering up and down, one knew not why.
A goodly vessel did I then espy
Come like a giant from a haven broad;
And lustily along the bay she strode,
Her tackling rich, and of apparel high.
The ship was nought to me, nor I to her,
Yet I pursued her with a lover's look;
This ship to all the rest did I prefer:
When will she turn, and whither? She will brook
No tarrying; where she comes the winds must stir:
On went she, and due north her journey took.
William Wordsworth