Review on ⏳ EMDMAK Sand Timer Set - Colorful Hourglass Sandglass Timer Pack for Games, Classroom, Home Office - 1 min/3 mins/5 mins/10 mins/15 mins/30 mins Sand Clock Timer (Pack of 6) by Helen Spencer

After 5 tries I took the average and the results are below. No timer of any length showed more than ±4 accuracy difference in any test, making them very accurate considering they are grain timers. A 1 minute timer averages 3 seconds, a 3 minute timer averages 1 second, a short 5 meter timer averages 8 seconds over a 10 minute timer. it lasted an average of 18s, the 15m timer averaged 45s short 30m 20s short I bought these timers knowing they were inaccurate, fortunately given their brand they are very accurate. 5 out of 5