SizeCompare is a visual size-comparison tool. It shows the physical dimensions of phones, tablets, laptops, tires, and everyday objects, then places them side by side at the same scale.

How does SizeCompare show true size?

Comparisons use one shared scale factor. Objects are never stretched or distorted, so the proportions on screen match their real-world proportions.

Where does the dimension data come from?

Dimensions come from official manufacturer specifications and standards such as ISO paper and credit-card sizes. Entries record their source and verification date.

You can compare products in the same category, portable devices with useful size references, curated cross-category pairs, living beings, or your own custom dimensions. Implausible pairings are blocked.

Can I compare custom dimensions?

Yes. Custom Size Compare accepts measurements in mm, cm, or inches. Dedicated calculators are also available for height, tires, screens, and general dimensions.

Yes. Comparison tools are free, with no ads and no signup required. The Privacy Policy explains analytics and cookies.

Real-World Size Comparison

Compare Sizes & Dimensions at True Scale

See how big a phone, tablet, laptop, tire, or everyday object really is. Compare two objects side by side or enter your own dimensions.

Compare Two Sizes Custom Dimensions

Official Sources
Verified Dimensions
True-Scale Visualization
No Affiliate Bias

Popular Size Comparisons

See how familiar products compare at the same physical scale.

View all comparisons

iPhone 17 vs iPhone Duo

iPhone Duo vs iPhone 18 Pro Max

iPhone 18 Pro vs iPhone 18 Pro Max

Apple Watch Series 12 (46mm) vs Apple Watch Ultra 4

AirPods 5 vs AirPods Max

iPhone Duo vs iPad mini (A17 Pro)

iPhone 16 vs iPhone 16e

Nintendo Switch 2 vs Nintendo Switch (OLED model)

iPhone 16 Pro Max vs Credit Card

iPhone 17 vs Passport (ID-3 Booklet)

iPad Pro 13" (M4) vs MacBook Air 13" (M4)

205/55R16 Tire vs 225/65R17 Tire

Popular Devices

Explore the physical dimensions of popular products.

View all devices

iPhone Duo84.1 mm × 117.8 mmW × H iPhone 18 Pro71.9 mm × 150.0 mmW × H iPhone 18 Pro Max78.0 mm × 163.4 mmW × H Apple Watch Series 12 (46mm)40.0 mm × 46.0 mmW × H Apple Watch Ultra 444.0 mm × 49.0 mmW × H AirPods 550.1 mm × 46.2 mmW × H iPhone 16 Pro Max77.6 mm × 163.0 mmW × H Samsung Galaxy S25 Ultra77.6 mm × 162.8 mmW × H iPhone 16 Pro71.5 mm × 149.6 mmW × H MacBook Air 13" (M4)304.1 mm × 215.0 mmW × H iPad 10.9" (10th gen)179.5 mm × 248.6 mmW × H Samsung Galaxy S24 Ultra79.0 mm × 162.3 mmW × H

Compare With Things You Know

Use familiar objects to understand real-world size.

View all reference objects

Credit Card85.6 mm × 54.0 mm A4 Paper210.0 mm × 297.0 mm A5 Paper148.0 mm × 210.0 mm Passport (ID-3 Booklet)88.0 mm × 125.0 mm US Dollar Bill156.0 mm × 66.3 mm Playing Card (Poker Size)63.0 mm × 88.0 mm Soda Can (330ml/355ml)66.0 mm × 122.0 mm

Tools

Calculate and compare dimensions yourself.

Custom Size CompareCompare database objects or enter your own dimensions.Open Height ComparisonPlot people and objects together on a true-scale ruler.Open Tire Size CalculatorCompare width, sidewall, diameter, and speedometer impact.Open Size CalculatorConvert dimensions and calculate area, volume, and differences.Open Screen Size CalculatorCalculate display width, height, and area from diagonal.Open

Popular Size & Dimension Searches

Quick access to dimensions people commonly look for.

iPhone 16 Pro dimensions iPhone 16 Pro Max dimensions Samsung Galaxy S25 dimensions MacBook Air dimensions A4 paper size Credit card size 205/55R16 tire size

Explore Categories

Browse devices and objects by category.

Phones25 devices Tablets6 devices Laptops4 devices Tires10 sizes Handhelds3 devices Everyday Objects17 objects

How SizeCompare Works

1ChoosePick two products, objects, or custom dimensions.
2CompareSee both at the same physical scale.
3UnderstandMeasure the exact differences and see what they look like in real life.

Built on Real Dimensions

SizeCompare uses real product specifications and standardized measurements to make physical size easier to understand.

Learn how we source and verify dimensions

Official Sources

Verified Dimensions

True-Scale Visualization

No Affiliate Bias

Compare Sizes & Dimensions at True Scale

Popular Size Comparisons

Popular Devices

Compare With Things You Know

Tools

Popular Size & Dimension Searches

Explore Categories

How SizeCompare Works

Built on Real Dimensions

Frequently Asked Questions

Compare Sizes & Dimensions at True Scale

Popular Size Comparisons

Popular Devices

Compare With Things You Know

Tools

Popular Size & Dimension Searches

Explore Categories

How SizeCompare Works

Built on Real Dimensions

Frequently Asked Questions