Westcott

Westcott JR-12 12-Inch Plastic T-Square Ruler

4.5 (2707 reviews)

Precision and Accuracy for Your ProjectsThe Westcott JR-12 Small Plastic T-Square is a versatile tool for drawing, DIY projects, and crafts. Measuring 12 inches/30cm, this T-square features both inch and metric calibrations, and a clear plastic body for easy alignment. Ideal for underlining notes...

$4.53*$4.69Save 3%
In Stock on Amazon.com
View on Amazon

*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

Precision and Accuracy for Your Projects

The Westcott JR-12 Small Plastic T-Square is a versatile tool for drawing, DIY projects, and crafts. Measuring 12 inches/30cm, this T-square features both inch and metric calibrations, and a clear plastic body for easy alignment. Ideal for underlining notes, drawing columns, or checking layouts, this T-square is a must-have for students and professionals seeking precision and accuracy.


Specifications:
  • Size: 12 inches / 30cm
  • Material: Plastic
  • Calibrations: Inch and Metric
  • Features: Transparent Body, Hang Hole

Key Features

T-Square for Crafting: Ideal for office and home use, this small T-square features a convenient transparent design

Inch and Metric Calibrations: This professional T-square features scales in both inches and centimeters

Easy To Use: This T-square ruler boasts a durable plastic body and precise edges that make it easy to underline notes, draw columns, or check the layout of your paperwork

Versatile: Ideal for inking, drawing, drafting, home improvement projects and crafts

Premium Quality: Westcott craft supplies & materials for drafting and drawing are some of the finest products of their kind for students and professionals

Specifications

Type
T-Square Ruler
Length
12-Inch
Material
Plastic
Design
Transparent
Calibrations
Inch and Metric

Pros & Cons

👍 Pros

  • Features a transparent design, allowing visibility of the underlying paper for precise alignment.
  • Includes both inch and metric calibrations, offering versatility for various measurement needs.
  • Boasts a durable plastic body, ensuring longevity and resistance to bending during use.
  • The precise edges facilitate easy underlining of notes, drawing columns, and checking paperwork layouts.
  • Ideal for a wide range of tasks including inking, drawing, drafting, home improvement projects, and crafts.

👎 Cons

  • The 12-inch length may be too short for larger drafting tables or extended drawing projects.
  • Made of plastic, it may not offer the same level of rigidity or weight as metal T-squares for heavy-duty use.
  • As a T-square, its primary function is for drawing horizontal lines against a straight edge, limiting other geometric drawing capabilities.
  • The transparent design, while beneficial, might make the calibrations harder to read under certain lighting conditions compared to opaque rulers.
  • The description does not specify if the head of the T-square is fixed or adjustable, potentially limiting its adaptability.

Frequently Asked Questions

This T-square ruler is 12 inches in length, making it a convenient size for various office and home uses.
Yes, this professional T-square features scales with both inch and centimeter calibrations for versatile use.
This T-square ruler is constructed with a durable plastic body, designed for longevity and ease of use.
It is ideal for a variety of tasks including inking, drawing, drafting, home improvement projects, and general crafts, offering precise edges for accuracy.
Yes, this small T-square features a convenient transparent design, allowing you to see your work underneath for accurate placement and alignment.