Westcott
Westcott 259 4-Inch Circular Protractor Measuring Tool
★★★★★
4 Inch
The Westcott 259 circular protractor offers full 360-degree measurement in half-degree increments with clear see-through construction.
$4.50*$7.63Save 41%
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.
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Overview
Key Features
CLEAR PROTRACTOR: 4 Inch and 360 Degree plastic protractor calibrated in 1/2 degre; Making it ideal for your drawing and drafting needs
ACCURATE MEASUREMENT: Protractor with easy to read numbers that record angles precisely and quickly
EASY TO READ: Angle protractor made of clear transparent plastic which allows viewing through to the page while you work
DURABLE MATERIAL: The surface of this plastic scale ruler is laminated with solid center for durability
MULTI PURPOSE: This measuring tool is ideal for artists, designers, architects, engineers, and students
Specifications
Brand
Westcott
Model
259
Size
4 inches (diameter)
Type
Circular (360-degree)
Calibration
Half-degree (0.5°) increments
Material
Clear transparent plastic, laminated with solid center
Intended Use
Drafting, drawing, design, architecture, engineering, education
Pros & Cons
👍 Pros
- Half-degree calibration provides more precise angle readings than typical one-degree protractors
- Full 360-degree measurement eliminates the need to flip or reposition for reflex angles
- Clear plastic construction allows you to see the work surface beneath during alignment
- Compact 4-inch size fits easily in pencil cases and drafting kits
👎 Cons
- 4-inch diameter may be too small for large-format drafting where longer reference lines are needed
- Plastic construction is less rigid than metal protractors and can flex under pressure
- Lacks a rotating arm or pointer, requiring manual alignment with a straightedge for precise readings
- Printed markings may wear with heavy use over time
Frequently Asked Questions
What degree increments does this protractor measure in?
It is calibrated in half-degree (0.5°) increments across a full 360-degree range, allowing for more precise angle measurements than standard one-degree protractors.
Can you see through this protractor while working?
Yes, it is made from clear transparent plastic, so you can view your drawing or draft underneath while aligning and measuring angles.
How large is the Westcott 259 protractor?
It is 4 inches in diameter, making it compact enough for portable use while still providing readable markings for accurate measurements.
Is the protractor durable enough for regular use?
The surface is laminated with a solid center construction, which helps resist cracking and scratching with repeated handling.
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