Choosing the right slab dimensions is essential for minimizing seams, controlling waste, and achieving a seamless installation, whether you’re crafting a modest vanity top or a sprawling kitchen island. In this 2025 deep‑dive, we’ll unpack standard, jumbo, and super‑jumbo quartz slab sizes (in feet, inches, and centimeters), explore quartzite comparisons, and answer your most pressing FAQs.

Quartz slab size cm

Quartz slab size cm

Standard Size of Quartz Slabs | Find your Perfect Size at China‑Quartz‑Stone

Most quartz manufacturers offer a Standard or Original slab size designed to cover average countertop layouts with minimal seams:

  • Imperial Dimensions: 63″ × 126″ (5.25 ft × 10.5 ft)

  • Metric Dimensions: 160 cm × 320 cm

  • Usable Area: ~27–30 sq ft per slab (accounting for edge losses) reddit.com

Common Thicknesses:

  1. 1.2 cm (½″): Lightweight accent surfaces

  2. 2 cm (¾″): Standard countertops

  3. 3 cm (1¼″): Premium, thicker profile often used on islands.

Ideal Quartz Slab Sizes for Your Budget & Style

Balancing slab size against project needs can optimize material usage and reduce costs:

  • Mini Slabs: ~31″ × 120″ (80 cm × 305 cm) — ideal for half‑baths or small vanities.

  • Standard Slabs: 55″ × 120″ to 63″ × 126″ (140 × 305 cm to 160 × 320 cm) — suits most kitchens and bathrooms.

  • Jumbo Slabs: 63″ × 128″ to 64″ × 126″ (160 × 320 cm) — larger dimensions reduce seams on L‑shaped counters.

  • Super Jumbo Slabs: 78″ × 138″ (200 × 350 cm) — maximum coverage for oversized islands and commercial installations.

Budget Implications:

  1. Mini Slabs: Lower material cost but higher per‑sq ft price.

  2. Standard Slabs: Best balance of cost and coverage.

  3. Jumbo/Super Jumbo: Premium pricing per slab but fewer seams and waste.

Super Jumbo quartz slab size

Super Jumbo quartz slab size

Largest Quartz Slab Sizes – Regular vs. Jumbo vs. Super Jumbo 2025

Slab Type Inches (W × L) Centimeters (W × L) Approx. Sq Ft Coverage
Standard 63″ × 126″ 160 × 320 cm ~27 sq ft
Jumbo 63″ × 128″ or 64″ × 126″ 160 × 320 cm ~28 sq ft
Super Jumbo 78″ × 138″ 200 × 350 cm ~37 sq ft
Cambria Large 132″ × 65.5″ 335 × 166 cm ~60 sq ft

Tip: Super Jumbo slabs (78″ × 138″) can yield 30–35 usable sq ft, reducing seam lines on grand kitchen islands.

Kitchen Consequential: Sizing Quartz for the Perfect Island

When designing an island, slab size directly impacts:

  1. Seam Visibility: Fewer seams enhance visual continuity.

  2. Waste Reduction: Larger slabs mean less off‑cut discard.

  3. Cost Efficiency: Although the per‑slab price is higher, you may need fewer slabs overall.

Planning Checklist:

  • Measure Island Footprint: Include overhangs and overmount sinks.

  • Overlay Slab Template: Work with your fabricator to map slabs on your CAD plans.

  • Factor Extra for Book‑Matching: If you plan book‑matched veining, order an additional slab.

FAQ

Below are detailed answers to the most common queries about quartz slab dimensions.

How big is a slab of quartz?

A typical slab measures 63″ × 126″ (160 × 320 cm), covering ~27 sq ft.

How big is a slab of quartz countertop?

Countertop slabs come in the same standard dimensions—63″ × 126″—but actual usable area is ~25–30 sq ft after accounting for cuts and edges reddit.com.

How big is a slab of quartz in inches?

  • Standard: 63″ × 126″

  • Jumbo: 63″ × 128″

  • Super Jumbo: 78″ × 138″.

How big is a jumbo slab of quartz?

Jumbo slabs typically measure 63″ × 128″ (160 × 320 cm), offering ~28 sq ft of surface area.

How big is a super jumbo slab of quartz?

The Super Jumbo size is 78″ × 138″ (200 × 350 cm), yielding up to ~37 sq ft and minimizing seams on large installations.

How big is a slab of Cambria quartz?

Cambria’s Fieldstone and similar large formats measure 132″ × 65.5″ (335 × 166 cm), covering approximately 60 sq ft per slab.

Calacatta quartz slab size

Calacatta quartz slab size

Conclusion

From Standard 63″ × 126″ slabs to Super Jumbo 78″ × 138″ behemoths and Cambria’s expansive 132″ × 65.5″ formats, quartz slab sizes cater to every scale of project in 2025. By understanding how dimensions translate to usable square footage, you’ll minimize waste, seams, and ultimately, cost, ensuring your countertops, islands, and commercial installations look seamless and spectacular.

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References

  1. Worktop Library, “Quartz slab sizes: know the perfect dimensions …,” published ~1.5 years ago. worktoplibrary.co.uk

  2. CarpetFloorAndMore, “Silestone Quartz Slab 1.2 cm×128″×63″,” accessed June 2025. carpetfloorandmore.com

  3. Reddit /r/CounterTops, “Slab usage,” published 11 months ago. reddit.com

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