Estimating and Measuring with Popsicle Sticks

This week we played around with the idea of estimating and units of measure. Students estimated various lengths around the classroom and then found the actual distance. We used popsicle sticks as our unit of measure. Next week we will use unifix cubes as our unit and compare the two. Why did it take more unifix cubes than popsicle sticks to measure the length of a friend?