Crystal Chandelier
Sizing & Specification
A working guide for rooms with height
Sixteen pages on the four decisions that are fixed before a fixture is built: diameter, drop, ceiling load and electrical specification — with the arithmetic behind each one.
What is inside
A measuring document, not a catalogue. Every rule is labelled as either a measured figure from our own catalogue or an industry convention — so you know which numbers you can defend in a specification.
- The three numbersDiameter, body height and total hanging height — and the two traps that cause most wrong orders
- Sizing by spaceFoyer, stairwell, dining room, bedroom and lobby, each measured from a different reference
- The drop subtractionClearance, void height and the suspension length that is left over, worked through
- Ceiling load and fixingWhat drives weight, and the two figures your contractor needs in writing
- Electrical specificationVoltage, frequency, sockets, lumens, circuit load and dimming ratings
- Certification and the briefCSA, UL, ETL and cULus, plus a fill-in worksheet that is enough to quote from
Written for interior designers, architects, contractors and private clients specifying a made-to-order crystal fixture.
Thank you — the guide is ready.
Download it below. We have also noted your interest so we can send the occasional technical note rather than a newsletter. You can unsubscribe from any email.
Download the guide (PDF) ↓If the button does not work, open the PDF directly. Sizing question? Send the room on WhatsApp.
Get the guide by email
One email, one PDF. No sales sequence, no sharing of your address.
Prefer a conversation? Send the floor-to-ceiling height, the width of the opening and what the ceiling is built from — we will come back with a diameter, a drop and a fixing arrangement your contractor can work to.
Ask on WhatsApp →Sizing a chandelier comes down to two numbers, and almost every question about proportion is really a question about one of them: the diameter the room can carry, and the drop the space allows. Everything else — style, material, tier count — is decided after those two. This page explains what each number depends on and points to the guide that works it through for your situation.
Diameter: what the room can carry
Diameter is read against the volume the fixture hangs in, not against the floor area alone. Two rooms of the same size behave differently if one has a flat ceiling at standard height and the other opens through two storeys, because the fixture is seen from further away in the second. A useful starting convention is that a chandelier is set at roughly half to two-thirds the width of the table or island it hangs over; in an open room with no table beneath it, the diameter is taken against the narrower of the two room dimensions. Neither is a rule, and neither replaces a drawing. The full method for an entrance with a table under it is in foyer chandelier size and drop .
Drop: what the space allows
Drop is the distance from the ceiling fixing to the lowest point of the fixture, and it is not the same as the height of the fixture itself. A piece with a 70 cm body hung on a 120 cm chain has a 190 cm drop, and it is the drop that decides whether people walk into it. Clearance is measured from the floor, from the table top, or from the stair tread directly below the fixture, depending on where it hangs. The distinction between fixture height and total hanging height is worked through in fixture height versus total hanging height .
By situation
Each of these links goes to the guide that covers that case, rather than repeating the arithmetic here.
- Two-storey entrance or foyer — the drop is set by the sightline from the door. Sizing for a double-height space .
- Stairwell or open stair — clearance is measured from the tread below, not the floor. Stairwell and staircase drop and clearance .
- Over a dining table — diameter against table length, height against the table top. Dining table chandelier size and hang height .
- Great room or very tall ceiling — diameter grows with the volume, and tier count replaces a single wide ring. Chandelier size for great rooms and tall ceilings .
- Ceilings of 20 ft or more — the usual conventions stop being useful. Chandeliers for 20 and 25 foot ceilings .
- Low ceiling — a flush or semi-flush fitting is usually the answer rather than a shorter chain. Chandelier for a low ceiling .
- Sloped or vaulted ceiling — the fixing angle changes the effective drop. Chandelier on a sloped or vaulted ceiling .
- Bedroom — the constraint is the foot of the bed, not the centre of the room. Bedroom chandelier size and height .
- Kitchen island — a group of pendants rather than one fixture. Island pendant height over a kitchen island .
- Too big, or too small — how to tell which problem you actually have. Chandelier too big for a room .
Converting between inches and centimetres
Most published rules are written in inches and feet while most of our listings are in centimetres, which is where a lot of apparent disagreement comes from. A figure quoted as 30 in is 76 cm, and a figure quoted as 1 m is 39 in; a rule written for a 12 ft room does not transfer to a 3.6 m room unless the conversion is done first. The conversion table and the common equivalents are set out in chandelier sizes in inches and centimetres .
What the rules of thumb are not
The proportions above are conventions drawn from interior practice, not engineering. They say nothing about what a ceiling can carry, whether a fixing point is adequate for the finished weight, or whether a fixture can be got into the building. Those are separate questions: the load side is covered in chandelier weight and ceiling load, and the structural assessment of any ceiling remains with a qualified engineer on your side. Published sizes and selectable options for our own range are listed in the specifications reference .
When the arithmetic is not enough
A number gives you a range; a drawing gives you a decision. Send the room dimensions, the ceiling height at the fixing point, the table or island size where there is one, and a photograph taken from the main entrance, and we return a proposed diameter, a drop, a tier count and a lamp specification for that space. Where the room is a double-height entrance or a stairwell, the photograph matters more than the dimensions, because the sightline is what the fixture is judged against.
Every fixture we make is built to order, so diameter, drop and tier count are set for the room rather than chosen from a shelf. The sequence from first drawing to delivery is described in the customization process, and worked examples sit in our projects .
Related collections: oversized chandeliers, high ceiling chandeliers, foyer chandeliers , staircase chandeliers .