Perfect Pi Diameter Circumference Tape Measure (DCT120)

Quick facts

Brand: ‎PERFECT MEASURING TAPE
Price: USD 19.99
Rating: 4.40 (1983 reviews)

The Perfect Pi Diameter Circumference Tape Measure (Model DCT120) is built for those moments when a standard tape just doesn’t cut it—like sizing pipe, measuring tree trunks, or checking round stock. This flexible, retractable steel tape gives you both standard measurements and outside diameter (OD) readings in one compact tool.

You can view the current price and full details on Amazon here.

For everyday measuring, the top side shows consecutive inches down to 1/16 inch. Flip it over for diameter measurements down to 1/100 inch, helping you move from “wrap-around” measuring to useful OD readings quickly. You also get metric markings down to millimeters on both sides, with high-contrast numbers that stay easy to read on the job.

A reflective aluminum rotating wheel brake makes retract control straightforward and boosts visibility, while the strong magnet on the case lets you stick it to metal surfaces when you want it close at hand.

Dual-purpose tape for outside diameter (OD) and standard measurements
12ft / 3.5m length with 1/2-inch blade width in a pocket-sized, flexible retractable design
Inch markings to 1/16 and diameter readings to 1/100 inch for measuring cylindrical objects
Metric scale down to millimeters on both sides with high-contrast, easy-read numbers
Reflective rotating wheel brake for controlled retraction and a magnetic case for quick attachment to metal

With a 4.4-star average rating across 1,983 reviews and a price point of $19.99, the DCT120 is a practical add-on for DIYers, woodworkers, plumbers, and anyone who frequently measures round objects.