干草车

Painted in oils on canvas, the work depicts as its central feature three horses pulling what appears to be a wood wain or large farm waggon across the river. Willy Lott's Cottage, also the subject of an eponymous painting by Constable, is visible on the far-left. The scene takes place near Flatford Mill in Suffolk, though since the Stour forms the border of two counties, the left bank is in Suffolk and the landscape on the right bank is in Essex.

The Hay Wain is one of a series of paintings by Constable called the "six-footers", large-scale canvasses which he painted for the annual summer exhibitions at the Royal Academy. As with all of the paintings in this series, Constable produced a full-scale oil sketch for the work; this is now in the Victoria and Albert Museum in London. Another small oil-sketch, the first in his experimentation with extending of the composition of the painting to the right, is now in the collection of the Yale Center for British Art. Constable originally exhibited the finished work with the title Landscape: Noon, suggesting that he envisaged it as belonging to the classical landscape tradition of representing the cycles of nature.

The painting measures 130.2 cm × 185.4 cm (51+1⁄4 in × 73 in).