LupinePet Fi Collar Original Designs
How do I choose a width?
What size collar should my dog wear?
Small Dogs - Collar lengths 6"-16" by 1/2" - Best for dogs under 20 lbs.
Medium Dogs - Collar length 9"-25" by 3/4" wide
Large Dogs - Collar length 12"-31" by 1" wide
The most accurate way to choose the correct size range is to measure your dog - but don't worry, it's quick and easy!
A fabric dressmaker's tape measure is easiest and most accurate. Or, a piece of string can also be used and then measured.
Measure the dog's neck comfortably snug against
the fur. Take the actual measurement and add 5% to determine the best size range.
Example: Actual measurement is 20" + 5% = 21"
Need help?
Contact us via chat support (M-F, 9-5, ET), email, or phone 800-228-9653 (M-F, 9-5, ET).
Product description
Upgrade Your Fi Collar
Fi-compatible replacement collars (collar only) for Fi Series 3 & 3+ receivers. Built for dogs that never slow down. From trail runs to lake swims to everyday walks, LupinePet Fi-compatible dog collars are engineered for comfort, durability, and secure GPS tracking performance.
LupinePet’s Fi collar fits Fi Series 3 & 3+. Collars available in ¾” & 1" wide with sizes from 11.5” to 32”, for small, medium, large and extra large dogs. Need a larger size? Let us know, we may be able to help!
Strong, durable and adventure-ready, these collars are designed to keep up with active dogs wherever they roam. Our premium-grade products draw inspiration from the durable components found in climbing and hiking gear, where strength and integrity matter most.
Choose from our best-selling Original Designs collection here or shop our Splash waterproof, Reflective, or other adventure-tested Fi-ready dog collars, compatible with Fi Series 3 & 3+ units.
Please Note:
- This item is the collar only. Learn more about Fi systems here.
- These items are custom made to order, please allow 1-2 days extra for production before shipment of your item.
- Because this item is custom made to order, it is a Final Sale Item. Although not eligible for return or exchange, it is covered under our, Even-if-Chewed, Guarantee!