Abstract: A combination marker and tape measure (10) having a housing (12), a flexible tape (18), and a pair of markers (104) which may be used to mark a surface on each side of the flexible tape (18). A front window cover (14) and bottom cover (16) enclose a compartment on a front surface (96) of the housing (12) to prevent exposure of the markers (104) to outside air. A plunger knob (42) is depressed into a recess (40) formed on a declining front face (38) of the housing (12) to move the markers (104) between a retracted configuration to an extended configuration. A locking mechanism (178) formed on a plunger (170) permits selective locking of the tape (18) to prevent coiling and uncoiling of the tape (18). A guide foot (154) removably mounted on an end tab (46) enables marking of a line (166) parallel to an edge (162) of a surface ( 164).