13mm sits in a genuinely interesting middle ground. It is larger than a centimeter but smaller than most people’s thumbnail...

Twelve millimeters sits in an interesting middle ground. It is too small to measure comfortably by eye, yet large enough...

11mm sits in an interesting middle ground. It’s noticeably larger than a grain of rice but small enough to disappear...

Ten millimeters sits in an interesting place on the scale of small things. It is not microscopic, but it is...

Nine millimeters sits in an interesting spot on a ruler. It is not so small that you need magnification to...

Eight millimeters sits in an interesting zone. It is small enough to overlook at a glance, yet large enough to...

Four millimeters sits in an interesting spot on the scale of small things. It’s too big to be invisible, but...

Five millimeters sits in an interesting place on the scale of small things. It’s not microscopic, but you’d never call...

Six millimeters sits in an interesting middle ground. It is small enough that most people would not notice it at...

Seven millimeters sits in an interesting middle ground. It’s too small to measure comfortably with your fingertip, yet large enough...