All in all, we spent hundreds of hours combing through thousands of user reviews to put together a comprehensive list of the best underground fence flags on the market. We then delved into these underground fence flags further and put together detailed reviews so that you can easily pick the best underground fence flags for your needs.

All in all, we spent hundreds of hours combing through thousands of user reviews to put together a comprehensive list of the best underground fence flags on the market. We then delved into these underground fence flags further and put together detailed reviews so that you can easily pick the best underground fence flags for your needs.

Best underground fence flags

Product Features Editor's score Go to site
IRWIN Marking Flags, 2-Inch x 3-Inch x 21-Inch, White, 100-Pack (2034204) IRWIN Marking Flags, 2-Inch x 3-Inch x 21-Inch, White, 100-Pack (2034204)
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PetSafe Boundary Flags PetSafe Boundary Flags
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SportDOG Brand Wire & Flag Accessory Kit for In-Ground Fence SportDOG Brand Wire & Flag Accessory Kit for In-Ground Fence
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Swanson Tool Co FW15100 2.5-Inch by 3.5-Inch Marking Flags with 15-Inch Wire Staffs, White, 100-Pack Swanson Tool Co FW15100 2.5-Inch by 3.5-Inch Marking Flags with 15-Inch Wire Staffs, White, 100-Pack
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Extreme Dog Fence Electric Dog Fence Boundary Flags for Visual Aid During Underground Dog Fence Training - 50 Flags Extreme Dog Fence Electric Dog Fence Boundary Flags for Visual Aid During Underground Dog Fence Training - 50 Flags
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50 Boundary Marker Training Flags for In-Ground Underground Dog Fence Systems 50 Boundary Marker Training Flags for In-Ground Underground Dog Fence Systems
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Educator FLAGS-50 Boundary Flags for E-Fence Underground Fence Containment System for Dogs, (Set of 50) Educator FLAGS-50 Boundary Flags for E-Fence Underground Fence Containment System for Dogs, (Set of 50)
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PetSafe Underground Fence Training Boundary Flags (100 Each) PetSafe Underground Fence Training Boundary Flags (100 Each)
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ACE Supply Marking Flags - 4 x 5-Inch Flag on 15-Inch Steel Wire - Fluorescent Orange, 100-Pack - Markers for Lawn Sprinklers, Irrigation, Property Line, Yard & Garden, Survey Stakes, Invisible Fence ACE Supply Marking Flags - 4 x 5-Inch Flag on 15-Inch Steel Wire - Fluorescent Orange, 100-Pack - Markers for Lawn Sprinklers, Irrigation, Property Line, Yard & Garden, Survey Stakes, Invisible Fence
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ACE Supply Marking Flags - 4 x 5-Inch Flag on 15-Inch Steel Wire - Green, 100-Pack - Markers for Lawn Sprinklers, Irrigation, Property Line, Yard & Garden, Survey Stakes, Invisible Fence ACE Supply Marking Flags - 4 x 5-Inch Flag on 15-Inch Steel Wire - Green, 100-Pack - Markers for Lawn Sprinklers, Irrigation, Property Line, Yard & Garden, Survey Stakes, Invisible Fence
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1. IRWIN Marking Flags, 2-Inch x 3-Inch x 21-Inch, White, 100-Pack (2034204)

Feature

Ideal for above-ground marking, even at minus 40 degrees.
Bright, fade-resistant color for maximum visibility.
Item Package Dimension: 24.0" L x 3.5" W x 0.7" H
Item Package Weight: 2.5 lb

2. PetSafe Boundary Flags

Feature

Use the 50 boundary flags to provide a visual reference when training your pet to learn the boundary
Place the boundary flag in the ground every 10 feet near the warning zone
When you are satisfied that your pet has mastered training, you may remove every other boundary flag every 4 days until all flags are removed
Save boundary flags for future use
Call, chat or email with our expert PetSafe US-based customer care specialists six days a week; They are waiting to assist you and your pet with your product needs
PetSafe brand has been an industry leading US manufacturer of pet behavior, containment and lifestyle products since 1991, helping millions of people and pets each year

3. SportDOG Brand Wire & Flag Accessory Kit for In-Ground Fence

Feature

Compatible with SportDOG Brand In-Ground Fence system (SDF-100A)
Allows you to add an additional 1/3 acre to your existing In-Ground Fence system
Includes 500 feet of 20-gauge wire, 50 boundary flags, 2 wire nuts, and 2 waterproof gel-filled splice capsules

4. Swanson Tool Co FW15100 2.5-Inch by 3.5-Inch Marking Flags with 15-Inch Wire Staffs, White, 100-Pack

Feature

Industry standard safety and marking solution
2.5 in x 3.5 in flag, 15 in staff
3 mil PVC provides strength and weather resistance
Flag glued to staff - not wrapped - for extra durability
Ideal for construction field layouts, line location, landscaping, pet containment, & more

5. Extreme Dog Fence Electric Dog Fence Boundary Flags for Visual Aid During Underground Dog Fence Training - 50 Flags

Feature

50 Training Flags - Which Will Cover Up to 500 Linear Feet of Boundary Wire. Set One Flag Every 10 Feet
Compatible with ALL Brands of Electric Dog Fence (Including Wireless Fences) Such as: Invisible Fence, PetSafe, eXtreme Dog Fence, Dogtra, Havahart, PetStop, SportDOG, Innotek, Perimeter Technologies, and ALL Others
Same Flags that Are Used by the Professional Inground Dog Fence Installation Companies
eXtreme Dog Fence Inground Fence Systems are Manufactured in the United States with Quality Craftsmanship
See Our Amazon Store for More Top Quality Electric Dog Fence Supplies and Pet Related Products

6. 50 Boundary Marker Training Flags for In-Ground Underground Dog Fence Systems

Feature

50 Boundary Marker Training Flags for In-Ground Underground Dog Fence Systems#0087/7

7. Educator FLAGS-50 Boundary Flags for E-Fence Underground Fence Containment System for Dogs, (Set of 50)

Feature

Set of 50 boundary flags for E-Fence underground fence containment system
Easy to install
Easily seen
Easy to remove
Age range description: All Life Stages

8. PetSafe Underground Fence Training Boundary Flags (100 Each)

Feature

Use the boundary flags to provide a visual reference when training your pet to learn the boundary
Place the boundary flag in the ground every 10 feet near the warning zone
When you are satisfied that your pet has mastered training, you may remove every other boundary flag every 4 days until all flags are removed
Save boundary flags for future use

9. ACE Supply Marking Flags - 4 x 5-Inch Flag on 15-Inch Steel Wire - Fluorescent Orange, 100-Pack - Markers for Lawn Sprinklers, Irrigation, Property Line, Yard & Garden, Survey Stakes, Invisible Fence

Feature

HIGHLY VERSATILE - Use our small yard flags to mark the boundaries of your lawn, plants in your garden, or landscaping plans. These PVC fluorescent orange stake flags are very visible from a distance.
STURDY & STABLE - Our marker flags are glued on, not wrapped, which makes them much harder to get blown away or removed. The pole itself is made of steel metal wire rather than plastic for better durability.
SIMPLIFIES IRRIGATION - Aerating yard? Mark the locations of sprinklers to avoid damaging them. Setting up a new sprinkler system? Use these flags to mark the location for each new sprinkler head.
GREAT FOR DOG OWNERS - These lawn flags are excellent for dog owners and can assist in boundary training. Use them to mark invisible fences and teach your pet to stay safe within your yard.
OTHER COMMERCIAL USES - Maintain workplace safety! Marking flags are essential during a ground survey for warning workers to the location of underground utility cables during construction.

10. ACE Supply Marking Flags - 4 x 5-Inch Flag on 15-Inch Steel Wire - Green, 100-Pack - Markers for Lawn Sprinklers, Irrigation, Property Line, Yard & Garden, Survey Stakes, Invisible Fence

Feature

HIGHLY VERSATILE - Use our small yard flags to mark the boundaries of your lawn, plants in your garden, or landscaping plans. These PVC green stake flags are very visible from a distance.
STURDY & STABLE - Our marker flags are glued on, not wrapped, which makes them much harder to get blown away or removed. The pole itself is made of steel metal wire rather than plastic for better durability.
SIMPLIFIES IRRIGATION - Aerating yard? Mark the locations of sprinklers to avoid damaging them. Setting up a new sprinkler system? Use these flags to mark the location for each new sprinkler head.
GREAT FOR DOG OWNERS - These lawn flags are excellent for dog owners and can assist in boundary training. Use them to mark invisible fences and teach your pet to stay safe within your yard.
OTHER COMMERCIAL USES - Maintain workplace safety! Marking flags are essential during a ground survey for warning workers to the location of underground sewer & drain pipes during construction.

Conclusion

By our suggestions above, we hope that you can found the best underground fence flags for you. Please don't forget to share your experience by comment in this post. Thank you!