Flag Football 

Field of play: length 50 yd (45,75 m), additional end zones 10 yd (9,15 m), width 25 yd (22,90 m). Total required space for one field including safety area: 76 yd (69,55 m) x 31 yd (28,40 m).
Width of lines: 4 inches (10 cm). If temporary lines are being used, they must be flat, solid and securely fixed to the ground with flat headed spikes.

The 1 and 2-point try marks shall be 1 yd (0,90 m) long and the mid-points shall be 5 yd (4,57 m) and accordingly 10 yd (9,15 m) respectively from the middle of the goal lines. The no-running zones shall be marked with disc markers at the side line and/or with a dashed line. Pylons or disk markers shall be placed at the 8 intersections of the side lines with the goal lines and end lines. Disk markers may be placed at the intersections of the side lines with the middle line and at the intersection of the longitudinal axis of the field with the safety area.

The safety area shall be 3 yd (2,75 m) outside the side lines and end lines, and needs to be on same level as the field of play and in the same condition. The safety area and team areas need not be marked but shall be observed by all participants. If two fields are next to each other the minimum distance between them is 6 yd (5,50 m) without team areas. A down indicator shall be operated 2 yards outside of the side line opposite the main stands. A 7-yd-chain (6,40 m) may be operated 2 yards outside of the side line next the main stands. A visible score board shall be operated near the field. 

International Championship Games
For international championship games additional field markings are required:
Lines every 5 yards from side line to side line ending 4 inches (10 cm) inside of them. The 5-yard lines shall be marked using dashed lines of 1 yd (0,90 m) length with 0.5 yard (0,45 m) interruptions. Yard line extensions 1 yd (0,90 m) long at every yard line along the longitudinal axis of the field and at both side lines, 4 inches (10 cm) inside of them between the goal lines. Numbers at the 10-yard and 20-yard lines with a height of 1 yd (0,90 m) at a distance of 3 yd (2,70 m) inside each side line.
Team areas shall be marked.
All 10 intersections of the side lines with the middle line, goal lines and end lines shall be marked with pylons and no disc marker needed at the longitudinal axis. An IFAF logo with a minimum length of 5 yards at the middle line. A countdown game clock shall be positioned opposite the main stand. This shall be a minimum of 1 yard (0.90 m) outside the safety area. The official time will be kept by the officials on the field and the visual clock shall be corrected if necessary. The game clock should be combined with the score board and may show additional information as team names, timeouts and down & distance. At both ends of the field, there shall be 25 second countdown play clocks. These clocks shall be positioned at the longitudinal axis at least 1 yard (0.90 m) outside of the safety area but no more that 5 yards (4.50 m) away from the end line and be between 2 and 5 yards (1.80 - 4.50 m) above the ground.

Beach Flag 

The surface should be sand and need not to be solid.
Field of play: length 25 yd (22,90 m), additional end zones 10 yd (9,15 m), width 25 yd (22,90 m). Total required space for one field including safety area: 51 yd (46,70 m) x 31 yd (28,40 m).
Width of lines: 2 inches (5 cm), field markings shall be made with solid bands securely fixed to the ground with flat headed spikes. Safety area as in Flag Football.
No-running zone marked with disc markers.