5mm

SPECIFICATIONS ♥ Total length 100 feet with 100 warm white wide angle 5MM bulbs. Clear wire with 24″ leads, 4″ spacing and 4″ tails. More lights will be brighter. Safe low voltage string lights, each string light comes with a 29 volt multifunction adapter. The waterproof design makes it suitable for both indoor and outdoor decoration.
MULTIMODE ♥ Steady lighting/flashing. The adapter allows you to choose from 8 lighting modes: 1. Combination, 2. In Waves, 3. Sequential, 4. SLO-GLO, 5. Chasing/Flash, 6. Slow Fade, 7. Twinkle/Flash, 8. Steady On. Just press the button on the adapter to select the mode you like. Expense of one string light would help you enjoy the fun of multiple string lights.
MULTI-ANGLE LIGHT SOURCE ♥ This upgraded fairy lights is different from ordinary string lights. It uses high-quality wide-angle LED bulbs, and each lights head is independent, which can diverge light at multiple angles. You will never worry about the light of the string being buried in the garden plants.