Full size, no crop.
No crop, this is right out of the camera.
This isn't cropped, we actually got within 5 feet of this least bittern, by turning off the motor and drifting up to the bird.
It is a fairly small bird at about 11 to 14 inches in length. For comparison an American robin is 9 to 11 inches.
It was out in the open on a weed mat and didn't pay any attention to us.
Thanks to its habit of straddling reeds, the Least Bittern can feed in water that would be too deep for the wading strategy of other herons.
source - https://www.allaboutbirds.org/guide/Least_Bittern/lifehistory