Is 1/4" and 3/8" so close in actual size there is no discernable difference?

There is a difference. The 1/4” measures 3/8” od with an overlap of 1/4”. The 3/8” measures1/2” od with an overlap of about 3/4.

What is the best way to measure the wires so I can determine the correct size needed to completely wrap around my wiring harness?

For example, the 1/2" loom size will fit around a 1/2" diameter wire bundle. You'll get about 25% overlap of the material.

Will this protect cable and ethernet wires if I run it over an electric radiator?

I would say no. It is just weaved plastic strands. It protects against scuff and possibly sharp edges but not heat. If you want heat protection use exhaust heat wrap

does this help stop rats and mice from eating your wires??

Definitely makes it harder for rodents to eat through to the wires but its not a guaranteed solution. Given enough time rodents will likely eat through anything that isn't metal mesh.

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Braided Split-Sleeve Wire Loom for High-Temperature Automotive Harness and Home Cable Management 25 feet (1/8")

Braided Split-Sleeve Wire Loom for High-Temperature Automotive Harness and Home Cable Management 25 feet (1/8")

Product ID: 534300751

📏25 feet of coverage

🔥Heat-resistant up to 150°C

🧵Durable braided PET material

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VT8538

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Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Wrap it, protect it, own it! 🔥

HEAT WARRIOR - Withstands extreme temperatures up to 150°C (302°F).
VERSATILE LENGTH - 25 feet of 1/8" sleeving for all your cable management needs.
ULTIMATE PROTECTION - Safeguards your automotive harness and cables from wear.
DURABILITY REDEFINED - Crafted from cut and heat-resistant braided PET polyester.
EFFORTLESS INSTALLATION - Split design for easy wrapping and 25% overlap.

The MGI SpeedWare Braided Split-Sleeve Wire Loom is a high-performance solution for managing automotive harnesses and home cables. With a split design for easy application, this 25-foot, 1/8" sleeving is made from durable, heat-resistant braided PET polyester, ensuring your wires are protected from extreme temperatures and wear.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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