SizeLength53cm,bust50cm Maximum relfective:This will be so much useful when you are running or walking or cyclking at night,or construction all day,once you wear our safety reflective vest. Adjustable one size:With buckles and elastic straps,our safety reflective vest can quickly adjust waist and shoulder,snug fit and doesn't move around when running,construction,cycling,or walking etc. 360 high visibility:Be easily seen by drivers from 800 ft away,our reflective safety vest can make you staying high visibility reflective and strongly enhance your safety,when running,construction, cycling,walking,or highway emergencies etc,durning the day and night. High Quality:Made by well constructed breathable nylon fabric and strong buckle:Our reflective safety vest can be easy folded up,storage and repeated use.It is also super lightweight,so this safety reflective vest is easy to carry,when you running,or construction,or cycling,or walking etc. Multi purpose use:The reflective safety vest can be used for running,construction,cycling,walking,horse riding,motorcycling,highway emergencies,skateboarding,skiing,snowboarding,dog-walking,play,car stopping,and search and rescue etc,wherever you want to be reflective and safety at day and night.