light up LED pet color size: XS, S, M, L, XL color: red, yellow. green, blue battery: ... / off Battery: 2* CR2016 battery. battery is includedSize: XS, S, M, L, XLMeasurement:Size Width LengthXS 1.5cm 18-28cmS ... 2.5cm 32-45cmM 2.5cm 40-48cmL 2.5cm 45-53cmXL 2 ... size XS don't have black border:The size of S, M, L, XL has black border:Production lead time: ...