Korean-Made Elastic Cord (Urethane Stretch Cord) — 0.8mm & 1.0mm

Korean-made urethane elastic cord is a top choice for jewelry makers who want strong stretch, smooth threading, and reliable recovery over time. This clear, crystal-style elastic is widely used for stretch bracelets and slip-on jewelry, offering a clean finish that holds up well with everyday wear.

Unlike basic elastic, urethane cord has a sleeker surface, consistent thickness, and excellent elasticity, making it easier to knot, hide, and thread through gemstone beads.

What you can make with Korean urethane elastic cord

Ideal projects (no clasp required):

• Stretch bracelets (gemstone, glass, wood, silicone beads)

• Stacking bracelet sets

• Stretch anklets

• Stretch rings

• Kids’ bead bracelets

• Mala-style stretch bracelets (bracelet length)

• Quick repairs for broken stretch jewelry

Not recommended for:

• Long necklaces (stretch may relax over time)

• Very small-hole beads such as most seed beads (use thinner elastic instead)

Size guide: 0.8mm vs 1.0mm

0.8mm — Most commonly used

Best for:

• Everyday gemstone bracelets

• Easier knot hiding

• Beads with slightly tighter holes

Most used bead sizes with 0.8mm

• 6mm round beads

• 8mm round beads

• 10mm round beads (if hole size allows)

1.0mm — Heavy-duty option

Best for:

• Heavier gemstone beads

• Larger bead holes

• Customers who wear bracelets daily and want extra durability

Most used bead sizes with 1.0mm

• 8mm round beads

• 10mm round beads

• 12mm round beads (with large holes)

Bead hole compatibility (more important than bead size)

Recommended hole sizes

• 0.8mm elastic → bead holes ~1.0mm or larger

• 1.0mm elastic → bead holes ~1.2mm or larger

If holes are tight:

• Use single-strand elastic

• Pre-stretch cord before stringing

• Use a collapsible-eye or fine beading needle

Best knot for urethane elastic cord

For long-lasting results, use a surgeon’s knot or square knot.

Finishing tips

• Gently pre-stretch the cord before measuring

• Tighten the knot slowly and evenly

• Add a tiny drop of jewelry glue if desired

• Trim closely and hide the knot inside a bead with a larger hole

YouTube: how to tie a secure knot for stretch cord

This video demonstrates a strong knot suitable for elastic jewelry cord:

Key product features

• Material: Urethane elastic cord

• Country of manufacture: Korea

• Sizes available: 0.8mm and 1.0mm

• Best for: Stretch bracelets, anklets, rings

• Finish: Clear / crystal

• Stretch recovery: Excellent when properly finished

• Recommended knot: Surgeon’s knot or square knot

• Care: Avoid over-stretching, harsh chemicals, and prolonged heat or sunlight