Benchlot

Starrett 18 inch square prices

What Starrett 18 inch squares actually sell for, from 9 recorded sales.

Sold prices

Median sold
$295
Most sell for
$175–$395
Sales on record
9
For sale now
0
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Every recorded sale. The band spans the middle half of all sales; the line is the median.
median $295Dealers9 sales$69 — Mint in Wrapper Starrett 18 Inch Scale for Combination Square (Jim Bode Value Guide)$165 — STARRETT No. 439 Builder’s Square & Protractor with Proper 18 Inch Rule (Jim Bode Value Guide)$175 — Very Fine STARRETT 18 Inch Combination Square (Jim Bode Value Guide)$225 — STARRETT Set Combination Square with Protractor & Center Finder 18 Inch Scale (Jim Bode Value Guide)$295 — Monster STARRETT No. 439 Builder’s Square (Jim Bode Value Guide)$379 — 18 Inch STARRETT No. 439 Builder’s Square & Protractor & Level (Jim Bode Value Guide)$395 — Rare STARRETT No. 439 Builder’s Square & Inclinometer (Jim Bode Value Guide)$395 — Rare and Fine STARRETT No. 439 Builder’s Square with Original Wide Blade (Jim Bode Value Guide)$395 — Fine 18 Inch STARRETT No. 439 Builder’s Combination Square and Protractor (Jim Bode Tools)$100$250

About Starrett 18 inch squares

The L.S. Starrett Company is an American precision tool maker based in Athol, Massachusetts, and has been producing measuring tools since the late 19th century. Its reputation rests on squares, calipers, rules and levels made to machinist tolerances, and the sample follows that pattern with combination and bevel squares, dividers, depth micrometer sets and machined rule clamps. Complete sets matter: a No. 445 depth micrometer with all its rods, or a combination square with the full head complement, beats an orphaned blade. Original boxes, crisp graduations, clean nickel or black wrinkle finish and legible trademark stamps all lift an example, while pitting, worn markings and missing accessories pull it down.

The 9 sales behind these figures come from Jim Bode Value Guide (8) and Jim Bode Tools (1), and run from 2021 to 2026; 1 closed in the last twelve months. 1 listing for sets, pairs or lots of Starrett 18 inch squares was left out, because a set's price is not one tool's price.

Recorded sales

Every sale behind the numbers above, most recent first. Click through to the source.

ListingSourceSoldPrice
Fine 18 Inch STARRETT No. 439 Builder’s Combination Square and ProtractorJim Bode Tools2026-04-22$395
STARRETT No. 439 Builder’s Square & Protractor with Proper 18 Inch RuleJim Bode Value Guide2024-04-23$165
Mint in Wrapper Starrett 18 Inch Scale for Combination SquareJim Bode Value Guide2022-12-16$69
18 Inch STARRETT No. 439 Builder’s Square & Protractor & LevelJim Bode Value Guide2022-07-09$379
STARRETT Set Combination Square with Protractor & Center Finder 18 Inch ScaleJim Bode Value Guide2022-03-19$225
Rare STARRETT No. 439 Builder’s Square & InclinometerJim Bode Value Guide2021-10-29$395
Monster STARRETT No. 439 Builder’s SquareJim Bode Value Guide2021-07-09$295
Very Fine STARRETT 18 Inch Combination SquareJim Bode Value Guide2021-05-20$175
Rare and Fine STARRETT No. 439 Builder’s Square with Original Wide BladeJim Bode Value Guide2021-02-02$395

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Updated 2026-10-13.