How Long Is a SIG Sauer P365? Dimensions & Size Guide (2026)

Introduction

Ever wondered how long a SIG Sauer P365 is in real life? The SIG Sauer P365 measures 5.8 inches (14.7 cm) end to end. This guide covers its length, weight, and size next to common objects and other pistols.

Quick Reference List of SIG Sauer P365 Sizes

Reference Guide — Quick Reference List

Full SIG Sauer P365 Length and Overall Dimensions

The SIG Sauer P365 figures below are for the headline model described in the introduction. Exact numbers can shift a little by configuration, so treat them as published figures for that model.

SIG Sauer P365 Overall Length

The SIG Sauer P365 has an overall length of 5.8 inches (147 mm). That figure is measured from the rear of the frame to the muzzle. As a micro-compact pistol, that length is the first number to check when comparing it with the other pistols in this set, because length, height and barrel length all move together.

SIG Sauer P365 Barrel Length

The standard SIG Sauer P365 barrel is 3.1 inches (78 mm) long. That is the barrel figure used in every comparison in this guide. The barrel is shorter than the overall length, as expected, because the frame and grip behind the slide make up the rest of the pistol’s length.

SIG Sauer P365 Length in CM and MM

The SIG Sauer P365 measures about 14.7 cm or 147 mm from end to end. As a decimal, that equals 0.15 meters. Multiply the SIG Sauer P365’s 5.8 inches by 2.54 to check the math, and you get 14.7 cm. Use this length in cm for any metric listing.

SIG Sauer P365 Variants and Their Lengths

Not every pistol in this family is the same length, so here is how the verified variants compare. Only variants with published figures are listed here.

P365 XL

The P365 XL is the larger sibling of the standard P365. It measures 6.6 inches long, 4.8 inches tall, with a 3.7-inch barrel and a weight of 20.7 oz. That is 0.8 inches longer, 0.5 inches taller and 2.9 oz heavier than the standard model, with a 0.6-inch longer barrel. If a listing gives 6.6 inches for a P365, it is almost certainly describing the XL, not the standard model covered in the headline figures above.

SIG Sauer P365 Length Compared With Everyday Objects

Familiar objects make 5.8 inches easy to picture.

US Dollar Bill

A us dollar bill is 6.14 inches long. That makes the SIG Sauer P365 about 0.34 inches shorter than the us dollar bill. A US dollar bill is about 6.14 inches long, so it is a handy flat reference you can hold next to a pistol. Hold a us dollar bill next to the SIG Sauer P365’s 5.8 inches, and the difference is easy to see.

Standard Smartphone

A standard smartphone is about 6.0 inches long. That makes the SIG Sauer P365 about 0.2 inches shorter than the standard smartphone. A standard smartphone is about 5.8 to 6.1 inches long, so about 6.0 inches is a fair typical figure for this comparison. Hold a standard smartphone next to the SIG Sauer P365’s 5.8 inches, and the difference is easy to see.

Standard Pencil

A standard pencil is about 7.5 inches long. That makes the SIG Sauer P365 about 1.7 inches shorter than the standard pencil. A standard unsharpened pencil is about 7.5 inches long, so it is longer than most compact pistols and close to full-size pistol length. Hold a standard pencil next to the SIG Sauer P365’s 5.8 inches, and the difference is easy to see.

Credit Card

A credit card is 3.37 inches long. That makes the SIG Sauer P365 about 2.43 inches longer than the credit card. A credit card is 3.37 inches long on its long side, so it is much shorter than any pistol in this set and works as a small-scale reference. Hold a credit card next to the SIG Sauer P365’s 5.8 inches, and the difference is easy to see.

SIG Sauer P365 Length Compared With Other Pistols

Side-by-side sizes show where this pistol sits among the other pistols in this set.

SIG Sauer P365 vs Glock 43X Length

The Glock 43X measures 6.5 inches (165 mm), with a 3.41 inches (87 mm) barrel, a height of 5.04 inches (128 mm) with magazine, a width of 1.10 inches (28 mm) overall, 0.87-inch slide, and a capacity of 10+1 rounds (factory). That makes the SIG Sauer P365 about 0.7 inches shorter than the Glock 43X. Placed side by side, the size gap comes from length, height and capacity together, not from length alone.

SIG Sauer P365 vs Springfield Hellcat Pro Length

The Springfield Hellcat Pro measures 6.6 inches (168 mm), with a 3.7 inches (94 mm) barrel, a height of 4.8 inches (122 mm), a width of 1.0 inch (25 mm), and a capacity of 15+1 rounds (17-round extended magazine available). That makes the SIG Sauer P365 about 0.8 inches shorter than the Springfield Hellcat Pro. Placed side by side, the size gap comes from length, height and capacity together, not from length alone.

SIG Sauer P365 vs Glock 17 Length

The Glock 17 measures 7.95 inches (202 mm), with a 4.49 inches (114 mm) barrel, a height of 5.47 inches (139 mm) with magazine, a width of 1.34 inches (34 mm) overall, 1.00-inch slide, and a capacity of 17+1 rounds. That makes the SIG Sauer P365 about 2.15 inches shorter than the Glock 17. Placed side by side, the size gap comes from length, height and capacity together, not from length alone.

SIG Sauer P365 vs SIG Sauer P320 Length

The SIG Sauer P320 measures 8 inches (203 mm), with a 4.7 inches (119 mm) barrel, a height of 5.5 inches (140 mm), a width of 1.4 inches (35.5 mm) with the medium grip module, and a capacity of 17+1 rounds. That makes the SIG Sauer P365 about 2.2 inches shorter than the SIG Sauer P320. Placed side by side, the size gap comes from length, height and capacity together, not from length alone.

SIG Sauer P365 Weight and Magazine Size

Weight and capacity round out the picture of how big this pistol is.

How Much Does a SIG Sauer P365 Weigh?

The SIG Sauer P365 weighs 17.8 oz (505 g) unloaded. Weight varies a little by configuration and by what is fitted, so always check whether a listing gives weight with or without a magazine. Because listed weights in this set use different bases — unloaded, without a magazine, with an empty magazine, or with a magazine — treat cross-model weight comparisons as published figures, not as readings from the same scale on the same day.

Standard Magazine Capacity

The standard SIG Sauer P365 magazine capacity is 10+1 rounds. That is the figure used in the comparisons in this guide. Capacity is a simple fact for size comparisons, since the magazine adds to the pistol’s overall bulk and grip length. Magazine sizes vary by configuration, so check any specific model before measuring.

9mm Cartridge Size (Measurement Facts)

The cartridge is often the next size question people ask. The facts below are measurements only.

9mm Bullet Diameter

The 9mm cartridge’s bullet is about 9 mm in diameter. The “9” in 9×19mm is the nominal bullet diameter figure. A 9 mm bullet is wider than a standard pencil lead and close in width to the diameter of a standard pencil’s eraser end, but use the published 9 mm figure for any listing, since sizes vary slightly by maker.

9mm Case and Overall Length

The 9×19mm cartridge case is 19 mm long. The complete cartridge, bullet included, is about 29.7 mm long. A credit card is 3.37 inches (about 85.6 mm) long, so the complete 9mm cartridge is roughly one-third of a credit card’s length.

FAQs About SIG Sauer P365 Length

How long is a SIG Sauer P365?

The SIG Sauer P365 is 5.8 inches long.

How long is a SIG Sauer P365 in cm?

The SIG Sauer P365 is about 14.7 centimeters long, or 147 millimeters. Multiply inches by 2.54 to convert.

How long is a SIG Sauer P365 barrel?

The standard SIG Sauer P365 barrel is 3.1 inches (78 mm).

How much does a SIG Sauer P365 weigh?

The SIG Sauer P365 weighs 17.8 oz (505 g) unloaded.

What is the capacity of a SIG Sauer P365?

The SIG Sauer P365 holds 10+1 rounds. It is classed as a micro-compact pistol.

Conclusion

Now you know how long a SIG Sauer P365 is, about 5.8 inches or 14.7 cm. Compared with everyday objects and other pistols, the size is easy to picture. Remember that length shifts slightly by model, maker, and configuration. For a general length reference, see NIST SI Units – Length.

Related Guides

• Glock 43X Dimensions: Length, Height, Width & Size Guide (2026)
• How Long Is a Springfield Hellcat Pro? Dimensions Guide (With Picture)
• How Long Is a Glock 17? Complete Dimensions Guide (With Picture)
• Sig Sauer P320 Dimensions: Length, Height, Width & Size Guide (With Picture)
• Weapons category

Sources: Manufacturer specifications (manufacturer product pages, checked October 2026).

Michael Carter

Hi, I’m Michael Carter, I write simple, everyday size guides so you can picture any measurement in seconds.