Best Lampshade Size for Table Lamps
Choosing the right lampshade size for your table lamp can completely transform how your room looks and feels.
Too small — and the lamp looks awkward.
Too large — and it overwhelms the base.
If you’ve ever wondered “What size lampshade do I need for my table lamp?”, this guide will walk you through it step-by-step.
The Golden Rule for Table Lamp Shade Size
The most reliable rule is:
The shade diameter should be roughly twice the width of the lamp base.
For example:
15cm wide base → 30cm shade
20cm wide base → 40cm shade
This creates balanced proportions and keeps the lamp visually grounded.
Shade Height: How Tall Should It Be?
A good guideline:
The shade height should be around two-thirds the height of the lamp base.
This ensures:
The bulb is hidden
The harp or fitting isn’t visible
The lamp looks proportionate
If the shade is too shallow, the bulb may glare.
Too tall, and the base can disappear visually.
Standard Table Lamp Shade Sizes
Here’s a quick reference guide:
Most UK table lamps suit drum shades between 30cm and 40cm diameter.
If you’re unsure, measure the base width first — that’s your starting point.
How to Measure Your Lamp for the Perfect Fit
You’ll need:
A tape measure
The lamp base (without current shade)
Step 1: Measure the Base Width
Measure the widest part of the base.
Step 2: Multiply by Two
This gives your ideal shade diameter.
Step 3: Measure the Base Height
Multiply by 0.6–0.7 to estimate suitable shade height.
This method works for most traditional and modern table lamps.
Should You Choose a Drum or Tapered Shade?
Both shapes work — but they create different effects.
Drum Shades
Clean and modern
Work well with linen and tweed
Even light diffusion
Most popular for contemporary interiors
Tapered Shades
More traditional feel
Suit classic lamp bases
Soften ornate shapes
If your base is minimal and contemporary, a drum shade usually works best.
Light Output & Lining Matters Too
Size affects proportion — but lining affects light.
If you're selecting a shade, consider:
White lining → Soft, diffused glow
Metallic lining → Brighter, warmer directional light
For reading lamps, metallic can be beneficial.
For ambient bedside lighting, white lining is often better.
(You may also find our guide on white vs metallic lining helpful.)
Common Mistakes to Avoid
Choosing based on bulb size
The bulb should not dictate shade size — proportion should.
Going too small
Undersized shades make lamps look top-heavy.
Ignoring room scale
A lamp may be proportionate to itself but too small for a large side table.
Example: Choosing a Shade for a Bedside Table Lamp
Let’s say:
Lamp base height: 40cm
Base width: 18cm
Ideal shade:
Diameter: ~35cm
Height: 22–26cm
This creates visual balance and ensures the bulb isn’t visible when seated in bed.
When to Go Slightly Larger
You can size up if:
The lamp sits on a large console table
You want a statement piece
The room has high ceilings
The base is slim and tall
A slightly oversized shade can feel luxurious — but avoid extremes.
Handmade Lampshades: Why Size Accuracy Matters
When buying a handmade lampshade, precision matters even more.
Unlike mass-produced shades, made-to-order pieces allow you to:
Select exact diameter
Choose exact height
Pair with fabric and lining options
This means you don’t have to “make do” with standard sizing.
A well-sized shade makes the lamp look designed — not accidental.
Final Thoughts: What’s the Best Lampshade Size?
The best lampshade size for a table lamp is:
✔ Around twice the base width
✔ Roughly two-thirds the base height
✔ Proportionate to the furniture it sits on
If in doubt, measure carefully — and when possible, choose a shade made to your exact requirements.
Lighting should feel intentional.
