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OSCO offers a complete selection of marking flags for utility and municipality safety marking, pesticide posting, lawncare/irrigation, marking sewer and drain lines, job site needs and more. All flags are made of durable 4-mil plastic. More than a dozen colors are available, including all American Public Works Association (APWA) colors, and long-lasting ink is used for any printing. 

Utility marking flags are commonly used to note where gas, electric, water, phone or other lines are buried. The utility flag markers serve a dual purpose: they protect the utility lines from damage and service disruptions if digging is taking place in the area, and they protect the person doing the digging from the risk of shock or explosion. 

OSCO marking flags can be used on any jobsite, construction site or utility location. Wire staffs are the most common, and staffs are also available in PVC plastic and fiberglass. Utility marking flags from OSCO are fade-resistant and are available in both standard and fluorescent colors.

APWA Color Standards

OSCO offers utility marking flags that follow APWA guidelines:

OSCO Red Marking Flag


Electric power lines, cables, conduit and lighting cables

OSCO Marking Flag - Orange


Communication, cable TV, alarm or signal lines, cables or conduit

OSCO Marking Flag - Yellow


Gas, oil, steam petroleum or gaseous materials

OSCO Marking Flag - Blue


Water, irrigation and slurry lines

OSCO Marking Flag - Green


Sewers and drain lines

OSCO Marking Flag - Pink


Temporary survey markings

OSCO Marking Flag - White


Proposed excavation and construction boundaries

OSCO Marking Flag - Purple


Reclaimed or non-potable water

Flags can be used with three staff options:

  • Wire — Sturdy 15.5-gauge steel
  • PVC Plastic — Solid 1/8", tangle-free
  • Fiberglass — Non-conductive, semi-rigid, .08" diameter

Fade-Resistant Flag Colors:

  • Standard: Red, White, Orange, Blue, Green, Yellow, Brown, Silver, Purple and Clear
  • Fluorescent: Flo Orange, Flo Pink, Flo Lime and Flo Rocket Red
  • Pantone matches available

Flag Sizes

Wire Staff: 
2.5" x 3.5" (6.4 cm x 8.9 cm) — 11.5" 
4" x 5" (10.2 cm x 12.7 cm) — 15", 18", 21", 24", 30", 36"
5" x 6" (12.7 cm x 15.2 cm) — 30", 36"

PVC Plastic Staff: 
2.5" x 3.5" (6.4 cm x 8.9 cm) — 11.5" 
4" x 5" (10.2 cm x 12.7 cm) — 18", 24", 27"
5" x 6" (12.7 cm x 15.2 cm) — 18", 24", 27"

Fiberglass Staff: 
4" x 5" (10.2 cm x 12.7 cm) — 18"

Minimum order of 1,000.
$50 setup charge for all new screens and screen changes.
No setup charge for any Generic Screen Imprints on file.

Chart displaying print area for flag sizes

Marking/Flagging Tape

  • Flagging Tape Rolls — 1-3/16" x 150 ft or 300 ft
  • Boxed Flagging Tape — 1" x 1,000 ft, 4 mil, self-dispensing
  • Warning/Barricade Tape Rolls — 3" x 6" x 1,000 ft 
  • Underground Detectable Tape Rolls — 2", 3" & 5" x 1,000 ft, 5 mil
  • Underground Non-Detectable Tape Rolls — 1-3/16" x 150 ft or 300 ft
Orange, White, and Yellow Marking Tape

Count On OSCO For All Your Safety Solutions

Along with utility marking flags and tape, OSCO is your complete resource for signs and decals and cathodic protection testing systems. We’re also your one-stop shop for a wide range of fiberglass-reinforced polymer (FRP) industrial safety products, including pultruded fiberglass grating, FRP molded grating, FRP platforms, FRP ladders, FRP handrails and other FRP structures.

Ready to Get Started?

Whether you simply need to replace a part or have a major project to start from scratch, our knowledgeable, experienced team is here to help.

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