How to Measure Your Face for Glasses: Find Your Perfect Fit

Key Points

• Measure your face width: Use a ruler to estimate your temple-to-temple width.
• Check your current glasses: A comfortable pair provides a useful size reference.
• Understand frame measurements: Frame width, lens width, bridge width, and temple length all matter.
• Consider your face shape: Choose frames that complement your facial features.
• Check the overall fit: Glasses should feel secure without slipping or pinching.

Finding glasses that look great is one thing. Finding frames that actually fit your face is just as important.

Whether you're buying prescription glasses online for the first time or replacing an old pair, knowing your face measurements can help you choose the right frame size with confidence.

1. How to Measure Your Face for Glasses

Your face width is a useful starting point for finding glasses that fit comfortably. You can estimate it at home using a mirror, a ruler, and a little help.

Method 1: Measure Your Face Width

What you'll need:

• A mirror
• A millimeter ruler
• Two straight-edged objects
• A friend to help (recommended)

Follow these steps:

Step 1: Stand upright in front of a mirror and look straight ahead.

Step 2: Locate the sides of your head near your temples, around where the glasses' arms would sit.

Step 3: Ask a friend to hold a straight-edged object vertically against each side of your head without applying pressure.

Step 4: Measure the horizontal distance between the two objects in millimeters.

Step 5: Repeat the measurement to check your result.

This gives you an approximate face width that you can use as a starting point when comparing eyeglass frames.

Tip: Face width alone doesn't determine your perfect frame size. The bridge design and temple fit also affect how comfortably glasses sit on your face.

Method 2: Check Your Current Glasses

Already have a pair of glasses that fits well? Measuring your existing frames is often the easiest way to find a similar size.

Follow these steps:

Step 1: Look inside the temple arm for three numbers, such as 52-18-140.

Step 2: Write down these measurements for reference.

Step 3: Measure the total width of your current frame, from one outer edge to the other.

Step 4: Compare these measurements with the frames you're considering online.

If your current glasses feel comfortable, choosing frames with similar dimensions is a good place to start.

2. Understanding Glasses Frame Measurements

When shopping for glasses online, you'll usually see several measurements listed in millimeters.

Understanding these numbers makes it easier to compare frames and choose the right size.

What Does 52-18-140 Mean on Glasses?

Most eyeglasses have three numbers printed inside the temple arm.

For example, 52 □ 18 140 means:

• 52 mm: Lens width
• 18 mm: Bridge width
• 140 mm: Temple length

These measurements describe important parts of the frame, but they don't directly tell you its total width.

Tip: Always check the overall frame width in the product details when comparing different glasses. Two frames with the same lens width can have different overall dimensions.

3. How to Choose the Right Glasses Size

Once you've measured your face or checked your current glasses, the next step is choosing a suitable frame size.

At MiGAFAS, our frame sizes are organized into four categories based on overall frame width.

MiGAFAS Frame Size Chart

These measurements can help you narrow down your options when shopping for prescription glasses.

If you already own a comfortable pair, compare its total frame width with the chart above.

If you're buying your first pair, use your estimated face width as a starting point and check the frame's other dimensions before making a decision.

Remember that a face-width measurement doesn't automatically translate into an identical frame-width requirement.

How Should Glasses Fit Your Face?

A well-fitting pair of glasses should feel comfortable and stay securely in place.

Signs your glasses are too small:

• The temples press against the sides of your head.
• The arms bend outward noticeably.
• You feel pressure around your temples or ears.

Signs your glasses are too big:

• Your glasses frequently slide down your nose.
• The frame extends too far beyond the sides of your face.
• The glasses feel loose during normal movement.

Signs your glasses fit well:

• The frame sits comfortably across your face.
• The bridge rests securely without pinching.
• The temples feel comfortable without excessive pressure.
• Your glasses stay in place without constant adjustment.

Tip: Frame width is important, but comfort also depends on nose bridge shape, temple design, and frame construction.

4. How to Choose Glasses for Your Face Shape

Finding the right frame size is essential for comfort, but choosing a flattering frame shape can make just as much difference to your overall look.

Your face size and face shape are two different things. People with the same face shape may still need different frame widths.

How to Determine Your Face Shape

To identify your face shape, compare four basic facial measurements:

1. Forehead Width

Measure across the widest part of your forehead.

2. Cheekbone Width

Measure the distance between the widest points of your cheekbones.

3. Jawline Width

Compare the width of your lower jaw.

4. Face Length

Measure from the center of your hairline to the bottom of your chin.

Comparing these proportions can help you identify whether your face is round, square, oval, heart-shaped, oblong, diamond-shaped, or triangular.

Best Glasses for Different Face Shapes

Different frame shapes can help balance or highlight your natural facial features.

These are general styling suggestions, not strict rules. The best glasses are the ones that fit comfortably and match your personal style.

Not sure which face shape you have?

Explore our Face Shape Finder to discover frame styles that complement your features.

5. Find Your Perfect Glasses at MiGAFAS

Choosing the right glasses doesn't have to be complicated.

Start with these three simple steps:

Step 1: Measure Your Face

Estimate your face width or check the measurements of your current glasses.

Step 2: Find Your Frame Size

Compare your measurements with our frame size chart and check the product details.

Step 3: Choose Your Favorite Style

Explore frame shapes that complement your face and reflect your personal style.

Ready to find your next pair?

Shop Prescription Glasses →

Frequently Asked Questions

How do I know what size glasses I need?

Start by measuring your face width or checking the dimensions of a comfortable pair of glasses you already own. Compare these measurements with the overall frame width listed on the product page.

What does 52-18-140 mean on glasses?

These numbers represent lens width (52 mm), bridge width (18 mm), and temple length (140 mm). They don't directly indicate the total frame width.

Should glasses be wider than your face?

Glasses should generally be close to your face width, with enough room to avoid pressure at the temples. The frame shouldn't extend excessively beyond the sides of your face.

Can I choose glasses based on my face shape alone?

No. Face shape can help you choose a flattering style, but frame width, bridge fit, and temple length are also important for comfort.

Is face width the same as pupillary distance (PD)?

No. Face width helps you estimate frame size, while pupillary distance measures the distance between your pupils for proper prescription lens positioning.

Learn more in our guide to measuring your PD at home.