How do i determine what size i need?

There is some "flex" in the sizing. The 1/2" has 3/8" when it is relaxed, and easily holds a thick HDMI cable, power cord, and USB 3 cable. The 1" starts at around 3/4" and can go larger than 1" - Turns out I didn't need the 1" A smaller size filled to capacity looks much neater than the next size up with space to spare.

Could I cut these to be shorter or will they fray?

If you cut it, please sear the edges with the flame from a lighter so that it will not fray.

Does the diameter specified include overlap of the loom? Or is it the strict max size cable around which it will stretch?

The diameter specified includes overlap of the loom. The diameter specified is in relax status.

How flexible is this cord? Can it go around a tight corner and not flex back?

It’s pretty flexible. A tight 90 degree would show a bump of some sort probably but it is great stuff and would look better than the wires going around the tight corner. As far as bounce back goes if you bent it around something and then laid it on a table it would straighten right out. It would need to be wedged in or zip tied to keep the corner in it. Hope that helps.

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13mm-3.1m Black Cable Sheath, Self Closing, Cable Management for Computer, Car, 10 Feet

Product ID: 282237186

Details

Brand
Alex Tech
Colour
Black.
Material
Polyethylene
Product dimensions
3.05L x 0.01W
Style
Woven

📏13mm diameter for versatile cable fit

🔥Heat resistant up to 257°F for durability

🖤Sleek black color for professional aesthetics

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€ 23.36

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Sold byAmazon PortugalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🖤 Sleek, smart, and secure – cable management that means business

CUSTOM LENGTH DIY - Cut to any size for tailored cable management solutions
SELF CLOSING SLEEVE - Automatically wraps cables for a clean, tangle-free look
UL RECOGNIZED SAFETY - Certified quality you can trust for home and office use
EFFORTLESS CABLE LOADING - Split design lets you add wires without unplugging connectors
BITE RESISTANT INSULATED - Protects cables and pets from damage and hazards

The Alex Tech 13mm-3.1m Black Cable Sheath is a premium PET split sleeving designed for easy wire loading and self-closing cable organization. Heat resistant up to 257°F and UL recognized, it offers bite-resistant insulation ideal for protecting cables in automotive, home, and office environments. With a sleek black finish and customizable length, it delivers professional-grade cable management that keeps your workspace tidy and safe.

Specifications

ASIN	B07FW3GTXB
Best Sellers Rank	#14,296 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #68 in Cable Sleeves
Brand	Alex Tech
Color	Black.
Customer Reviews	4.6 4.6 out of 5 stars (80,060)
Enclosure Material	Polyethylene Terephthalate
Installation Type	cable sheath
Item Dimensions L x W	3.05L x 0.01W Meters
Manufacturer	Alex Tech
Mfr Part Number	sr1/2inblack10ft
Model Number	sr1/2inblack10ft
Number of Pieces	1
Style Name	Woven
UPC	704256862428
Unit Count	1.0 Count

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