'Full length' in the Bible

Saul immediately fell down full-length on the ground. He was terrified because of Samuel's words, and he had no strength because he had not eaten food all day and all night.

And the Levites {alongside} the territory of the priests [shall have] twenty-five thousand [cubits] [in] length and in width ten thousand [cubits], its {full length}, twenty-five thousand [cubits] and its [full width], ten thousand [cubits].