# SawChainSize.com

> Chainsaw chain size lookup by saw model and fitted bar length. For each saw we publish pitch, gauge, drive-link count, file size and chain part numbers, marked VERIFIED, VERIFY ON BAR STAMP or SOURCES CONFLICT, with the sources behind every figure and a last-verified date. The bar is what decides the chain: always match pitch, gauge and drive links against the stamp on your guide-bar tail.

Contact: contact@sawchainsize.com
Full content for LLMs: https://sawchainsize.com/llms-full.txt
Sitemap: https://sawchainsize.com/sitemap-index.xml
Data last verified: 23 October 2026

## Saw models

- [Stihl MS 170 / MS 180 chain size](https://sawchainsize.com/saws/stihl-ms-170-180/): Stihl's entry-level saws. Stock 16″ setup: 3/8″ Picco low-profile, .043″ gauge, 55 drive links — Stihl 61 PMM3.
- [Stihl MS 250 chain size](https://sawchainsize.com/saws/stihl-ms-250/): One of the best-selling homeowner saws in North America — and the model where published chain specs contradict each other most. Bar-first verification matters most here.
- [Husqvarna 450 Rancher chain size](https://sawchainsize.com/saws/husqvarna-450-rancher/): 50.2 cc ranch saw. Stock 18″ setup: .325″ pitch, .050″ gauge, 72 drive links — Husqvarna H30 / X-CUT SP33G.
- [Husqvarna 455 Rancher chain size](https://sawchainsize.com/saws/husqvarna-455-rancher/): 55.5 cc ranch saw. Factory 20″ setup per Husqvarna's own manual table: 3/8″ pitch, 72 drive links — in both .050″ and .058″ gauge versions.
- [Echo CS-400 chain size](https://sawchainsize.com/saws/echo-cs-400/): 40.2 cc homeowner saw on 3/8″ low-profile chain. Oregon's data: 16″ bar, .050″ gauge, 56 drive links, 5/32″ file.
- [Echo CS-590 Timber Wolf chain size](https://sawchainsize.com/saws/echo-cs-590/): 59.8 cc firewood saw. Echo's manual specifies Oregon 72LPX chain, 3/8″ pitch; the standard 20″ bar takes 70 drive links at .050″ gauge.
- [Poulan 2150 / 3816 chain size](https://sawchainsize.com/saws/poulan-2150/): Common big-box homeowner saws. Oregon lists both for its 91-series chain: 16″ bar, 3/8″ low profile, .050″ gauge, 56 drive links.

## Brands

- [Stihl](https://sawchainsize.com/brands/stihl/): Stihl chain is sold through authorized dealers rather than online, so most replacement buying runs through Oregon-equivalent loops matched on pitch, gauge and drive links. Stihl's own designations — such as 61 PMM3 for the Picco Micro Mini 3 low-profile chain — are listed on each saw page next to the cross-references we could verify.
- [Husqvarna](https://sawchainsize.com/brands/husqvarna/): Husqvarna publishes bar and chain combination tables in its operator manuals, listing bar length, pitch, gauge, chain type and drive-link count per model. Its chain codes — H30 and X-CUT SP33G for .325″, H80 and H81 for 3/8″, H37 and H38 for 3/8″ low profile — are the cross-reference keys on every Husqvarna page here.
- [Echo](https://sawchainsize.com/brands/echo/): Echo's operator manuals are unusually direct about chain: they name the factory-fitted Oregon chain type, and Echo sells matching loops under its own part numbers such as 72LPX70CQ. The 3/8″ full-size and 3/8″ low-profile families are easy to confuse across the CS-400 and CS-590.
- [Poulan / McCulloch](https://sawchainsize.com/brands/poulan/): Poulan saws are among the most common budget homeowner saws in US garages, and several appear by name in Oregon's fitment data for its 91-series low-profile chain. McCulloch saws of the same era were built on related platforms, but per-model McCulloch fitments are published here only when traced to a citable source.

## Chain specs (pitch x gauge)

- [3/8″ pitch, .050″ (1.3 mm) gauge](https://sawchainsize.com/chain/3-8-050/)
- [3/8″ pitch, .058″ (1.5 mm) gauge](https://sawchainsize.com/chain/3-8-058/)
- [3/8″ Low Profile pitch, .043″ (1.1 mm) gauge](https://sawchainsize.com/chain/3-8-lp-043/)
- [3/8″ Low Profile pitch, .050″ (1.3 mm) gauge](https://sawchainsize.com/chain/3-8-lp-050/)
- [.325″ pitch, .050″ (1.3 mm) gauge](https://sawchainsize.com/chain/325-050/)

## Bar lengths

- [16-inch bar](https://sawchainsize.com/bars/16-inch/)
- [18-inch bar](https://sawchainsize.com/bars/18-inch/)
- [20-inch bar](https://sawchainsize.com/bars/20-inch/)

## Guides

- [How to verify your chain size](https://sawchainsize.com/guides/how-to-verify-chain-size/): Bar stamp, drive-link count, pitch and gauge measurement.
- [Chain identification chart](https://sawchainsize.com/guides/chain-size-chart/): Pitch x gauge x file size and Oregon/Stihl/Husqvarna/Carlton code cross-reference.
- [How to count drive links](https://sawchainsize.com/guides/how-to-count-drive-links/): Mark one link, count the tangs, match the box.
- [Oregon 72 vs 73 chain](https://sawchainsize.com/guides/oregon-72-vs-73-chain/): 3/8" pitch; 72 is .050" gauge, 73 is .058" gauge.
- [Chainsaw chain file size](https://sawchainsize.com/guides/chainsaw-chain-file-size/): Round file size by pitch.
- [How we verify specs](https://sawchainsize.com/how-we-verify/): Source hierarchy and conflict handling.
- [Affiliate disclosure](https://sawchainsize.com/affiliate-disclosure/): No active affiliate relationships; links are untagged and earn no commission.

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