[emma_teddy]

i believe for wire mesh you want around 1/4-1/2 inch mesh. better to be too small than too big. for a secon level, hamsters don necessarily need levels, but if you want to add a bit of height, you can try sloping bedding, or using an ikea Knuff magazine holder on it's side with the bottom cut off as a shelf/hide. you don't want anything too high that your hamster can fall off of.