How to Choose a Lampshade: Size, Shape and Fittings Explained
A lamp is really two purchases in one. The base sets the style and the shade decides the proportions, the mood and how the light actually falls in the room. Knowing how to choose a lampshade is the difference between a lamp that looks considered and one that always seems slightly wrong, however lovely the base underneath it happens to be.
The good news is that there are only a handful of rules to learn, and most of them come down to two measurements and a fitting type. In this guide our team explains the sizing our showroom uses, what each shade shape does to the light, how UK fittings work, and which fabrics and linings give you that warm golden glow rather than a flat, chilly one.
Why the shade matters as much as the lamp
The shade is the part of the lamp doing the optical work. It hides the bulb from direct view, softens the light passing through it, and directs the rest up towards the ceiling and down onto the table or floor. Change nothing but the shade and you genuinely change the character of a room, sometimes far more than swapping the base would.
It also sets the visual weight of the piece. A shade that is too small leaves a lamp looking top heavy and exposed, while one that is too large swamps the base and dominates the surface it sits on. Because the shade is at eye level in most rooms, any mistake in proportion is the first thing a visitor notices when they walk in.
Then there is the practical side. Shades protect your eyes from glare, which matters enormously beside a bed or a reading chair, and they control how much light reaches the ceiling. Our lamp shades collection covers everything from slim bedside drums to generous floor lamp shades, and the right one turns a decent lamp into a genuinely good one.
Getting the size right: the two rules we use
Start with height. As a general rule the shade should be around two thirds the height of the lamp base, measured from the bottom of the base to the top of the bulb holder. A 30cm base therefore wants a shade of roughly 20cm in height. It is a forgiving rule rather than a strict one, but stray far from it and the lamp starts to look unbalanced.
Then check the width. Measure the base at its widest point and roughly double it to find your ideal shade diameter. Just as importantly, the bottom of the shade must be wider than the widest part of the base, and it must sit low enough to conceal the bulb holder and any hardware completely when viewed from a normal seated position.
Two quick sanity checks finish the job. From a standing position you should not be able to see the bulb, and from your usual seat on the sofa you should not see the bare bulb either. If you are between two sizes, our team tends to size up rather than down, because a slightly generous shade almost always looks more deliberate than a mean one.
Shade shapes and what each one does
The drum is the most versatile shape, with straight vertical sides that throw a generous amount of light both up and down. It suits modern and transitional interiors, works on almost any straight sided base, and is the easiest shape to get right if you are unsure. Slim drums are the standard choice for bedside lamps because they take up so little visual space.
Empire and coolie shades slope inwards towards the top, which pushes more light downwards into a pool. Empire shades are the classic choice for traditional turned or candlestick bases, while the shallower coolie shape works beautifully on a wide floor lamp beside a reading chair. Bell shades do the same job with a soft curve and a decidedly more period feel.
Square and rectangular shades echo the lines of a square or angular base and look crisp in a contemporary scheme. Tapered squares are a good middle ground. Whichever shape you pick, look at the silhouette of the base first: rounded, curvy bases generally like rounded shades, and straight, geometric bases like straight ones.
Fittings explained, so your shade actually fits
This is where most people come unstuck. In the UK a shade attaches in one of a few ways, and the type is usually printed in the product details. A ring fitting simply drops over the bulb holder and is held by a shade ring, and it comes in two sizes to match the two common bulb caps, bayonet and Edison screw. Check which your lamp takes before ordering.
A duplex fitting uses a separate metal spider that sits on the lamp and is secured with a finial, which allows the shade to be raised or lowered slightly. A gimbal fitting has arms fixed inside the shade that clamp onto the bulb holder, and it is the type you often find on smaller traditional shades and on wall lights.
Pendant shades are a slightly different exercise, because a shade designed to hang needs a fitting suited to a ceiling pendant rather than a lamp. Some shades are dual purpose and will do both jobs happily. If you are shading a ceiling fitting, browse our pendant lights collection instead, and pair it with the right bulb cap so everything simply screws or clicks together.
Fabric, lining and colour change the light
The material decides how much light escapes through the sides of the shade. Pale linen, cotton and parchment glow gently when lit, spreading a soft ambient wash into the room, which is exactly what you want in a sitting room or bedroom. An opaque or card shade blocks the sides entirely and sends all its light straight up and down, giving crisper pools and more contrast.
The lining is the detail people forget, and it quietly sets the colour of your light. A white lining keeps things clean and bright, an ivory or champagne lining warms the light, and a brushed gold lining gives that lovely candlelit glow much loved in dining rooms and snugs. A dark inner lining absorbs light, so avoid it where you actually need to read.
Colour and pattern are the fun part. A patterned shade reads as a decorative object by day and becomes a soft lantern once lit, so choose a design that looks good both switched on and off. Deep colours suit a room that already has plenty of light, whereas a north-facing or naturally dim space is better served by cream, oatmeal or warm ivory.
Matching the shade to the bulb
Shade and bulb work as a pair. Check the maximum wattage stated for the shade and stay within it, since a bulb that runs hot in an enclosed shade can scorch the fabric or lining over time. Modern LEDs make this far easier because they produce so little heat, which is one reason they suit small bedside shades and tightly enclosed fittings so well.
Colour temperature matters just as much. A warm white bulb at 2700K flatters a cream or linen shade and gives the soft golden light most homes want in the evening, while anything above 4000K can make the same shade look grey and clinical. If you are choosing new light bulbs at the same time, keep every lamp in the room on the same temperature.
Think about the shape of the bulb too. In an open topped or very pale shade the bulb is partly visible, so a decorative filament style looks far better than a bare plastic capsule. In a narrow shade, check the bulb length as well, because a long filament bulb can sit proud of the top or press against the lining.
Room by room, and the mistakes to avoid
Bedside lamps want a small drum or empire shade of roughly 20cm to 25cm across, sitting low enough that the bulb is hidden when you are lying down. Living room table lamps take a more generous 30cm to 40cm, and floor lamps happily carry 35cm to 50cm, especially the wider coolie shapes that pour light down onto a book or a piece of needlework.
In a dining room or a hallway, a fabric pendant shade softens overhead light beautifully and stops a bare bulb glaring across the table. Keep the shades within a single room broadly consistent in fabric and lining, even where the shapes differ, so the scheme reads as one idea rather than a collection of unrelated lamps.
The three mistakes we see most often are a shade that is too small for its base, a shade that fails to hide the bulb holder, and a dark lining in a room that needed the light. All three are easy to fix. Browse our table and floor lamps alongside the shades, or send our team a photo and a couple of measurements and we will happily talk it through.
Frequently asked questions
What size lampshade do I need for my lamp?
Aim for a shade around two thirds the height of the lamp base and roughly twice its widest width. The bottom of the shade should always be wider than the widest part of the base, and low enough to hide the bulb holder from both standing and seated positions. If you are between two sizes, choose the larger one.
How do I know which lampshade fitting I need?
Check how the shade attaches. A ring fitting drops straight over the bulb holder and comes in sizes to match bayonet or Edison screw caps. A duplex fitting uses a separate spider and finial, and a gimbal fitting clamps onto the holder with fixed arms. Look at your lamp's bulb holder first, then match the shade to it.
Does the lampshade lining affect the colour of the light?
Yes, noticeably. A white lining keeps the light clean and bright, ivory or champagne warms it, and a gold lining gives a rich candlelit glow that suits dining rooms and snugs. Dark linings absorb a lot of light, so avoid them beside a reading chair or anywhere you need genuine brightness.
Can I use a table lampshade on a ceiling pendant?
Only if the shade is designed for it. Many shades are dual purpose and will work on both a lamp and a pendant, but some have fittings suited to one or the other. Check the product details for a pendant or dual fitting, and make sure the shade sits far enough below the ceiling rose to conceal the bulb.
What shape of lampshade suits a traditional lamp base?
Empire and bell shades are the classic partners for turned, candlestick and ceramic bases, because their sloping sides echo the curves of the base and push light downwards. Straight sided drum shades suit modern, geometric bases better. As a quick guide, match rounded shades to curvy bases and straight shades to angular ones.
