A tier-by-tier guide to seal stone sizes for retail and education buyers: practice blanks, standard Shoushan formats and custom sizes, with MOQ, lead time and documentation per rung.
Why a Size Ladder Matters Before You Order Seal Stones
Seal stone ranges fail at retail for a predictable reason: the buyer stocks one middle size, and the shelf then serves neither the school program looking for cheap blanks nor the gift customer looking for a presentable block. A range that sells through needs a ladder — an entry size that classrooms can afford, a standard tier that covers name seals and studio work, and an upgrade path for collector and gift programs.
Seal stone sizes are therefore the first specification to settle, before grade talk or packaging decisions. This article walks through the two documented size tiers in our seal carving catalogue — a 2 × 2 × 6 cm practice blank and a 3 × 3 × 8 to 5 × 5 × 12 cm natural Shoushan range — plus the custom-size path above the standard range, with the MOQ, lead time and documentation that come with each rung.
Rung One: 2 × 2 × 6 cm Practice Blanks for Classrooms
The Practice Seal Stone is the entry rung. It is cut in a 2 × 2 × 6 cm format from selected natural stone at practice grade — large enough for layout, knife control and full-character carving, small enough to keep the per-student cost proportionate for class budgets. Hardness is graded so beginners get uniform cutting resistance across the batch, the carving surface is tested per batch, and every stone is checked for structural integrity so hidden cracks are screened out at the workshop rather than in the classroom.
For distribution, this tier ships in bulk packaging designed for classroom counting rather than retail shelving. Custom school labeling is available on the packaging, illustrated carving guides in multiple languages can be included by request, and hardness test reports ship with the order. MOQ is 200 pieces and standard lead time is 25–35 days after sample approval.
Rung Two: 3 × 3 × 8 to 5 × 5 × 12 cm Shoushan Formats
The Premium Shoushan Seal Stone covers the middle and upper rungs in one documented range: 3 × 3 × 8 cm up to 5 × 5 × 12 cm, the formats most used for name seals, collector pieces and studio carving work. The stone is natural Shoushan from verified quarry sources, selected for fine grain and consistent carving texture.
What separates this tier from the practice rung is documentation density. Each stone undergoes structural integrity testing, grain grading and color evaluation before shipment, and every order ships with origin certificates and quality grading records — the paperwork a collector or gift program needs to pass along with each piece. MOQ is 50 pieces and standard lead time is 30–45 days after sample approval.
Above the Range: Custom Sizes for Collector and Gift Programs
When a program needs dimensions beyond the standard range, custom size production takes 35–50 days once the specification is agreed, and a custom presentation box is available for premium retail sets, gift programs and exhibition pieces. Plan the sequence deliberately: the standard 30–45 day lead time starts after sample approval, and custom size work follows its own 35–50 day production window — so a collector tier with non-standard dimensions needs both clocks budgeted, not one.
MOQ, Lead Time and Documentation by Tier
| Tier | Size | MOQ | Lead time | Documentation |
|---|---|---|---|---|
| Practice blank | 2 × 2 × 6 cm | 200 pcs | 25–35 days after sample approval | Hardness test reports; AQL inspection |
| Standard Shoushan | 3 × 3 × 8 to 5 × 5 × 12 cm | 50 pcs | 30–45 days after sample approval | Origin certificate, structural test reports, grain and color grading records |
| Custom sizes | Beyond the standard range | Quoted per inquiry | 35–50 days production after spec agreed | Confirmed with the quotation |
Each tier carries its own MOQ, so a ladder buyer should treat the two catalog tiers as separate order lines and confirm both quantities in the inquiry. Trade terms — FOB, CIF or DDP — are quoted per inquiry on both tiers.
Packing: Classroom Bulk versus Presentation Box
The bottom rung packs for distribution efficiency: bulk school packaging that supports counting and per-class handout, optionally carrying the school's own label. The upper rungs pack for the shelf: a custom presentation box is available on Shoushan orders, which matters most for gift programs and exhibition pieces where the box is part of the perceived value. Decide the packing format per tier before sampling, because it affects the carton plan and the quotation.
Frequently Asked Questions
Q: Can I combine the two size tiers in one order?
A: Each tier has its own MOQ — 200 pieces for practice blanks and 50 pieces for Shoushan formats. Send both quantities in your inquiry and we will quote the program as a split order.
Q: Which size should a beginner program start with?
A: The 2 × 2 × 6 cm practice blank is the standard beginner stone — it suits first-year carving curricula and name-seal practice while keeping material costs proportionate for class budgets.
Q: What documentation comes with a Shoushan order?
A: Origin certificates, per-stone structural test reports, and grain and color grading records ship with every order, so batch-to-batch comparison is verifiable on paper.
Q: Do practice stones come with teaching materials?
A: Illustrated carving guides in multiple languages can be included by request — confirm the languages and quantities when ordering so they are prepared with the shipment.
Q: How far ahead should a custom-size collector tier be planned?
A: Budget both windows: sample approval before the standard lead time starts, and 35–50 days of custom size production once the specification is agreed.
Build Your Ladder
Tell us your target size tiers, the split between classroom and collector volumes, packing preferences, and destination port, and our team will respond with current pricing, lead times and a sample plan for both tiers.