Weight: Approximately 30-35g Length: Approximately 9 cm These are domestically bred mice. Product images are for reference only. Please note that the actual body color may vary. Please understand that there may be slight variations in size and weight. We may have more in stock than the number listed. If you would like to purchase more than the listed quantity, please inquire. Shipping will be via Kuroneko Yamato's Cool Takkyubin (refrigerated delivery service). Please note that we may be delayed 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. Regarding shipping costs: We receive inquiries about including shipping in the product price. While it is possible to create a dedicated listing that includes shipping, the fees deducted from the shipping cost would result in a loss for us. If you would like to include shipping, the price will be the standard Kuroneko Yamato shipping fee plus a handling fee. Thank you for your understanding.