UK Headstone Size Quick Reference — Every Standard NAMM Dimension in One Place
Ordering granite from India means specifying dimensions correctly the first time. Get a size wrong on a quote request and the whole enquiry slows down — a clarifying email back and forth, a revised proforma, a week lost. This UK headstone size quick reference brings every standard NAMM-aligned dimension together in one table, so a mason can check a measurement in seconds and move straight to placing the enquiry. Whether you are specifying an upright, a flat marker, a kerb set or a ledger slab, the figures below are the ones used across the UK memorial trade — in inches, with millimetre conversions alongside.
Quick Answer
Standard UK headstone sizes range from an 18×12×3″ cremation tablet to a 48×18×4″ large companion upright. Flat markers run 24×18×3″ to 30×18×3″. Kerb sets use 36×6×4″ standard sides with 18×6×4″ ends. Ledger slabs are typically 72×24×3″ or 90×30×3″. All figures are approximate industry standards — confirm with the receiving cemetery before ordering.
Upright Headstones — Standard Dimensions
Upright headstones remain the most ordered format across UK cemeteries, and the size names below are the ones used consistently between masons and suppliers. Monumental grade thickness — 75mm to 100mm — is specified separately from the height and width figures in the table, because thickness affects structural stability rather than visual proportion.
| Size Name | Inches | Millimetres | Notes |
|---|---|---|---|
| Compact single | 18 × 12 × 3″ | 457 × 305 × 76mm | Tolerance ±2mm. Mirror polish, engraving-ready face. |
| Standard single | 24 × 18 × 4″ | 610 × 457 × 102mm | Tolerance ±2mm. Most commonly ordered upright size. |
| Large single | 30 × 18 × 4″ | 762 × 457 × 102mm | Tolerance ±2mm. Specify monumental grade 75–100mm thickness. |
| Extra large | 36 × 18 × 4″ | 914 × 457 × 102mm | Tolerance ±2mm. Specify monumental grade thickness for structural stability. |
| Standard companion | 42 × 18 × 4″ | 1067 × 457 × 102mm | Tolerance ±2mm. Confirm base width against this die size. |
| Large companion | 48 × 18 × 4″ | 1219 × 457 × 102mm | Tolerance ±2mm. Largest standard companion format. |
Why thickness is specified separately
Height and width describe the visible face of the stone. Thickness is a structural decision, not a stylistic one. A 75–100mm monumental grade thickness is the standard recommendation for uprights at the larger end of this table, because a thin upright at companion length is more exposed to wind load and ground movement than a compact single. Confirm the thickness your cemetery’s foundation specification expects before finalising the order.
Flat Markers and Cremation Tablets
Flat markers and cremation tablets sit lower to the ground and follow a simpler dimension set, but they still vary enough between cemeteries that checking the table before quoting saves a revision later.
| Size Name | Inches | Millimetres | Notes |
|---|---|---|---|
| Standard flat marker | 24 × 18 × 3″ | 610 × 457 × 76mm | Tolerance ±2mm. Mirror polish standard. |
| Large flat marker | 30 × 18 × 3″ | 762 × 457 × 76mm | Tolerance ±2mm. Engraving-ready face verified before dispatch. |
| Cremation tablet | 18 × 12 × 3″ | 457 × 305 × 76mm | Tolerance ±2mm. Matches compact single upright footprint. |
| Cremation tablet, large | 24 × 12 × 3″ | 610 × 305 × 76mm | Tolerance ±2mm. Common in dedicated cremation sections. |
Kerb Sets — Typical Dimensions
Kerb sets enclose the full grave footprint rather than marking a single point, so the table below splits the long side pieces from the shorter end pieces.
| Component | Inches | Millimetres | Notes |
|---|---|---|---|
| Standard kerb — sides | 36 × 6 × 4″ | 914 × 152 × 102mm | Tolerance ±2mm. Two pieces per set. |
| Standard kerb — ends | 18 × 6 × 4″ | 457 × 152 × 102mm | Tolerance ±2mm. Two pieces per set. |
| Full kerb — sides | 72 × 6 × 4″ | 1829 × 152 × 102mm | Tolerance ±2mm. For extended plot lengths. |
| Full kerb — ends | 24 × 6 × 4″ | 610 × 152 × 102mm | Tolerance ±2mm. For extended plot lengths. |
Ledger Slabs — Typical Dimensions
Ledger slabs cover the full grave and tend to follow two common sizes across UK cemeteries, with the larger format reserved for plots with more generous allocated space.
| Size Name | Inches | Millimetres | Notes |
|---|---|---|---|
| Standard grave ledger | 72 × 24 × 3″ | 1829 × 610 × 76mm | Tolerance ±2mm. Mirror polish or honed on request. |
| Large grave ledger | 90 × 30 × 3″ | 2286 × 762 × 76mm | Tolerance ±2mm. Confirm plot dimensions before ordering. |
Converting between inches and millimetres
One inch equals 25.4mm. One foot equals 304.8mm. These two figures cover every conversion needed across the tables above — multiply the inch measurement by 25.4 to get millimetres, or divide the millimetre figure by 25.4 to get back to inches.
A note on cemetery variation
Every figure in this reference reflects standard industry sizing used consistently across the UK monumental trade. Individual cemetery authorities can and do set their own size limits, particularly for upright height and kerb footprint, so always verify against the specific cemetery’s regulations before placing a production order. A size that is standard nationally can still be rejected locally if it exceeds a particular authority’s plot allowance.
For the full background on how NAMM dimensions are set and why they matter for engraving layout, see our earlier NAMM reference guide. For Absolute Black granite specifications and grade options that pair with these dimensions, visit the Absolute Black product page.
Frequently Asked Questions
What is the standard size for a single UK headstone?
The standard single upright headstone in the UK is 24 × 18 × 4 inches (610 × 457 × 102mm). This is the most commonly ordered size across UK cemeteries and works for the majority of standard plot allocations. Larger formats — 30 × 18 × 4″ or 36 × 18 × 4″ — are used where the cemetery permits a bigger memorial or the family has requested additional inscription space.
Do all UK cemeteries accept the same headstone dimensions?
No. The dimensions in this reference reflect standard industry sizing used across most UK cemeteries, but individual cemetery authorities set their own rules on maximum height, width, and kerb footprint. Always confirm the specific cemetery’s current regulations before finalising an order, particularly for companion uprights and full kerb sets, which are the formats most likely to exceed a local size limit.
What thickness should I specify for an upright headstone?
Monumental grade thickness of 75mm to 100mm is the standard recommendation for upright headstones, particularly at the larger end of the size range — extra large and companion formats. Thinner stone is more exposed to wind load and ground settlement over time. Confirm the exact thickness against your cemetery’s foundation specification before placing the order.
How do I convert these measurements if my software uses millimetres only?
Multiply any inch figure by 25.4 to get millimetres, or divide a millimetre figure by 25.4 to convert back to inches. One foot equals 304.8mm. Every dimension in the tables above already includes the millimetre conversion, so this is only needed if you are working from a different size specification.
Use the dimensions in this reference directly in your enquiry to StoneCrest — give us the size name or the exact measurement, and we confirm availability and price the same day. Get in touch with your specification and we will work from the table above to quote against the exact size you need.