(as) pretty as a picture
(as) pretty as a picture
Very visually attractive or appealing; having a picturesque beauty. The girls Alex dates are always pretty as a picture, but don't have much going on between their ears. This part of the country looks as pretty as a picture in the summertime.
*pretty as a picture
very pretty. (*Also: as ~.) Sweet little Mary is as pretty as a picture. Their new house is pretty as a picture.
pretty as a picture
Very attractive, as in She looked pretty as a picture in her new hat. The noun picture alone was used to describe beautiful objects from the early 1800s on; this locution, however, dates from about 1900.