Most listings use woven or synthetic fabrics: nylon and polyester are common. A few crossbody phone straps use a woven crochet-style fabric.
Lengths vary: some badge lanyards show about a 14" neck drop (roughly 17.5" total length in those listings), some straps are around 21" overall, and crossbody phone straps can be listed up to 56".
Many include breakaway neck clasps and quick-detach or slide-release buckles so the ID or bottom segment can be detached without removing the whole strap.
Care varies by material: some nylon lanyards are described as hand-washable, while woven phone straps and certain designs recommend spot-cleaning with a damp cloth and avoiding excessive water.
Listings highlight durable fabric construction, clear ID holders or secure pouches, breakaway safety closures, and detachable buckles—features that support daily wear and event use.