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Eyeglass Frame Size & PD Measurement Guide Bangladesh 2026
This eyeglass frame size PD measurement guide Bangladesh helps you find your perfect fit. Understanding the technical details of frame size and Pupillary Distance (PD) is crucial before you order, and this guide provides everything you need.
Understanding Your Eyeglass Frame Size
Most frames have three numbers engraved on the inner temple arm, for example: 52-18-140. Each number corresponds to a specific measurement:
- First Number (e.g., 52): Lens Width — How wide the lens is in millimeters.
- Second Number (e.g., 18): Bridge Width — The distance between the two lenses, over the nose.
- Third Number (e.g., 140): Temple Length — The length of the arm that goes behind your ear.
How to Find Your Right Size
The easiest way is to check the inside of your current glasses. If those fit well, look for the numbers printed there. Searching online with these specific numbers will help you find frames that match your face perfectly. If you don’t have glasses, you can estimate your size by measuring your face width in millimeters.
Choosing Frames Based on Face Shape
- Small/Narrow Face: Lens width of 48mm to 51mm.
- Medium Face: Lens width of 52mm to 54mm.
- Large/Wide Face: Lens width of 55mm or more.
What is PD and Why is it Necessary?
PD (Pupillary Distance) is the distance between the centers of your pupils, measured in millimeters. When crafting prescription lenses, the optical center of the lens must align perfectly with your pupil center. If your PD is incorrect, you may experience headaches, eye strain, or blurry vision.
How to Measure Your PD
Method 1: Ask Your Optometrist
This is the most reliable method. During your eye exam, ask your doctor to provide your PD measurement. Most doctors include it on your prescription.
Method 2: Measure Yourself in a Mirror
Hold a millimeter ruler against a mirror, parallel to your eyes. Measure the distance from the center of your left pupil to the center of your right pupil. The average PD for adults typically ranges between 60mm and 65mm.
Need Help with Sizing at OpticoBD?
Every product page on our website clearly lists the frame dimensions. If you are still unsure about the fit, simply include your current frame size or face measurements in the “Order Note” section during checkout. Our experts will review it and provide the best recommendation. Additionally, you can use our Home Try-On service to have 4 frames delivered to your door to test them yourself.
Frame Size Chart: Small, Medium & Large
| Size Category | Lens Width (mm) | Bridge Width (mm) | Temple Length (mm) | Best For |
|---|---|---|---|---|
| Small (S) | 48 – 51 | 14 – 17 | 130 – 135 | Narrow face, children, teens |
| Medium (M) | 52 – 54 | 17 – 19 | 135 – 140 | Average adult face |
| Large (L) | 55 – 58 | 19 – 21 | 140 – 150 | Wide face, oversized styles |
3 Methods to Measure Your PD at Home
| Method | What You Need | Steps | Accuracy |
|---|---|---|---|
| Mirror Method | Ruler, mirror, marker | Stand 20cm from mirror, hold ruler, measure pupil-to-pupil | ⭐⭐⭐ Good |
| Friend Method | Ruler, friend | Face friend, look past their shoulder, they measure pupil-to-pupil | ⭐⭐⭐⭐ Better |
| PD App Method | Smartphone with camera | Use a PD measurement app with credit card for scale | ⭐⭐⭐⭐⭐ Best |
Frequently Asked Questions (FAQ)
Q: Can I adjust a frame if it’s a bit too large?
A: Metal frames are often adjustable. However, TR90 or plastic frames have limited flexibility. It is always better to get the right size from the start.
Q: What if my prescription doesn’t mention PD?
A: Don’t worry! Contact us, and we will guide you on how to measure it, or we can use a standard PD value for your order.
Q: Is children’s PD different?
A: Yes. Children’s PD is smaller than adults, usually between 50mm and 58mm. We strongly recommend getting this measured by an eye care professional.
