A hardy and cold-tolerant species of cricket means they withstand the winter well.House brown crickets are available in a variety of sizes to cater for reptiles of different weights and stages of development: Hatchlings (1-2mm), 1st (3-5mm), 2nd (6-8mm), 3rd (8-10mm), 4th (12-14mm), Standard (15-18mm), Large (19-22mm).Care Instructions: As with all live food, it is essential they are kept healthy. Packed in bran, ensure the crickets are kept at a regular temperature of approximately 60-65F (15-18C) and away from bright light. To encourage the maximum shelf-life, empty into a smooth-sided container with a vented lid. Add a slice of potato to provide moisture. Proper supplementation should be given prior to feeding to your reptile. Don't forget live food can be affected by cold weather.