Weight: Approximately 23-29 g Length: Approximately 8 cm Regarding the mice, we breed them for stock individuals that only eat our live mice. However, the size has become larger, so we are selling them at a bargain price. Some individuals have slightly yellowed fur, so we are listing them as "defective." Although there are yellowed parts in the fur, they have been washed and disinfected before packing and freezing, so please use them with confidence. To cherish life, we offer them at a bargain price rather than disposing of them. Please understand that there may be some variation in size and weight. We may have more stock than the listed quantity, so please inquire if you wish to purchase more than the listed amount. Shipping will be via Kuroneko Yamato's Cool Takkyubin (refrigerated delivery service). We may be late in responding or unable to respond on Saturdays and Sundays. Also, we may not be able to ship on Saturdays and Sundays. Thank you for your understanding. Please note: We receive inquiries asking to include shipping costs. It is possible to add the shipping cost to the product price and create a dedicated listing. However, in that case, a commission will be deducted from the shipping cost, resulting in a loss on shipping. If you wish to include shipping, the price will be the standard Kuroneko Yamato shipping fee plus a commission. Thank you for your understanding.