One size fits most suspender lengths are fully adjustable with an elastic slider at the part that attaches to the back of the pants. 3 Mode Settings: Steady Light - Fast Flash Slow Flash (Rainbow braces only have one flash mode and one color changing mode. LED Strap: Battery Replacement: It is powered by 2 CR2032 batteries (not included). LED Ties: Portable and easy to use, the battery pack fits anywhere in your bag. A bright, elegant and stylish tie will attract a lot of attention Wide range of uses: beautiful costume accessories suitable for most adults, can be applied to St. Patrick's Day, bars, club events, masquerade parties, parades, photo props and other joyful events. Package includes: 1 light up stand. 1 x LED tie