Second: 10cm Third: 9cm Fourth: 5.8cm Fifth: 9cm Sixth: 2.2cm Seventh: 8cm Eighth: 9ccm *Please note that the insertion slot is stiff.* I'm not very familiar with hamsters, so I've measured and listed the sizes. Please feel free to purchase if you're interested♪ ✨For those who prefer anonymous shipping, we can accommodate it for an additional fee.✨ ☆Although unused, please understand that it has been stored at home before purchasing. The reason I've listed it as "Like New" is because I took it out of the bag once for inspection! I will ship it in a plastic bag to prevent it from getting wet‪ ·͜·♡ Please rest assured that I do not have any pets! You can purchase without leaving a comment. Even if there are comments, the person who purchases first will be given priority. Returns are not accepted after evaluation. Thank you for your understanding. #sushop Click here for other products✧‧˚ 5-43 0033 0561