1 For postage rates for Large Letters, please click Local Mail, Air Mail, Surface Mail for details. 2  Maximum dimensions: length, width and depth combined: 900 mm, but the largest dimension may not exceed 600 mm. 3  Minimum dimensions: 90 mm x 140 mm.  Maximum weight: 2 kg.
Confidence votes 572. Some people would consider the risk of bacteria in food being left out too great to risk eating after one hour. Open Yogurt will separate after 4 hours, and will spoil after 12 hrs at room temp. Yogurt, though, is produced with bacteria, changing its spoilage dynamic.
How long can yogurt be left out of refrigerator. So I left my containers of sealed Vosko's Fig Greek Yogurt out on a counter in a cold house during an unseasonable warm California winter weekend.