40mm Round Self-Inking Stamp
The 40mm round self-inking stamp (R-40) — a popular standard size for company logos with circular text. Factory direct OEM supply with custom logo, colors and private label packaging.
Quick Facts
The 40mm round self-inking stamp (R-40) is a compact business stamp with a 40mm round imprint, suited to company logos with circular text, office approval stamps and general business documentation. It supports OEM logo plates, custom housing colors, private label packaging and a replaceable ink pad.
Product Overview
The 40mm round self-inking stamp (R-40) is a standard size in our R-Series lineup. The 40mm imprint gives enough space for a company logo in the center with circular company name text around it, which makes it the standard choice for company seals, office approval stamps and business documentation.
As a round self inking stamp manufacturer, Hongli produces the R-40 in-house from ABS housing injection to die plate engraving and final assembly. Wholesale buyers, importers and office supply brands order the 40mm round stamp with custom logo plates, custom housing colors and private label packaging.
Technical Specifications
Technical Specifications — 40mm Round Self-Inking Stamp
| Product Name | 40mm Round Self-Inking Stamp (R-40) |
|---|---|
| Shape | Round |
| Impression Size | Round, Ø40 mm imprint |
| Plate / Die | Round 40mm die, engraved from your artwork (best seller for company logos with circular text) |
| Body Material | Durable ABS plastic case (multiple colors available) |
| Ink Pad | Replaceable, water-based quick-dry ink |
| Ink Colors | Black, Blue, Red, Green, Violet |
| Impression Life | Up to 5,000+ clear impressions before re-inking |
| Logo | Custom logo available |
| Shell Color | Custom color available for bulk orders |
| MOQ | 100 pcs with your custom logo / plate text |
| Sample | Logo proof in 3 days after artwork confirmation; physical sample in 3 days |
| Bulk Lead Time | 15–25 days depending on quantity |
| Packaging | Individual box + export carton; OEM / private label packaging available |
Key Features
Durable ABS Body
Impact-resistant ABS housing stands up to daily office use and repeated transport for export orders.
Smooth Self-Inking Mechanism
The die flips against the built-in ink pad automatically, giving a clean, even impression with every press.
Clear, Consistent Impression
Laser-engraved rubber die reproduces fine logo details and small circular text sharply at 40mm.
Replaceable Ink Pad
The ink pad slides out for replacement, so the same housing stays in service for years.
Custom Logo Plate
Send your logo and text; our design team prepares a free proof before production.
Built for Bulk Orders
Stable repeat quality across thousands of pieces, with mixed ink colors available in one order.
Common Applications
Company Seals
The classic round company stamp with the business name around a central logo — the most requested layout at 40mm.
Office & Administrative Stamps
Approval, received and certified-copy stamps for daily paperwork in offices and institutions.
Retail & Loyalty Stamps
Round logo stamps for loyalty cards, packaging and paper bags in retail and hospitality.
Custom Logo and Shell Colors
Every 40mm stamp is produced from your artwork. We engrave the die from your vector file (AI, PDF or CDR) and send a digital proof within 3 days for confirmation. If your logo needs adjustment for a round layout, our designers adapt it free of charge.
Standard housing colors are available from stock, and custom shell colors can be matched for bulk orders. See custom stamp colors for color options and MOQ details.
Replaceable Ink Pad
The R-40 uses a slide-in ink pad that can be replaced in seconds. Replacement pads are available in black, blue, red, green, violet and can be ordered together with the stamps or as repeat supply. Distributors usually add a percentage of spare pads to each bulk order. Details are on the replacement ink pads page.
OEM Packaging and Private Label
Stamps ship in individual boxes inside export cartons. For brand owners we produce custom stamp packaging — printed color boxes, header cards, inserts and barcode labels — and full private label stamp programs with your branding on the product and the box.
MOQ & Samples
Samples are produced from your final artwork so you can check the impression, housing and packaging before bulk production. Mixed models and sizes can be combined in one order.
Manufacturing & Quality Control
Production covers ABS injection molding, die engraving, pad filling, assembly and impression testing. Each batch is checked for imprint clarity, mechanism smoothness and housing finish before packing. More about our process is on the self-inking stamp manufacturer page.
Learn more about our production on the Self-Inking Stamp Manufacturer page, or contact our team for factory details.
Compare Other Round Stamp Sizes
All four round sizes share the same self-inking mechanism, ABS housing and OEM options. Use the table below to compare and switch between models.
| Imprint Size | Product Page | Recommended Use |
|---|---|---|
| 40mm | 40mm — Current Model | General office and standard company stamps |
| 42mm | View 42mm | Company and business stamps with longer names |
| 45mm | View 45mm | Larger logos and official-style stamps |
| 50mm | View 50mm | Large logos and maximum round impressions |
For a full selection walkthrough, read the 40mm vs 42mm vs 45mm vs 50mm Round Self-Inking Stamp Size Guide.
Related Products
R-42 · 42mm
Extra room for longer company names and detailed logos.
R-45 · 45mm
Larger imprint for complex logos and more text.
R-50 · 50mm
Largest standard round model in the R-Series.
Replacement Ink Pads
Replaceable ink pads for all R-Series round self-inking stamps.
Need Your Own Brand?
We support custom logo plates, custom housing colors, private label packaging and bulk repeat production for importers, wholesalers and office supply brands.
Quick Factory Quote
Send model, size, quantity, logo requirement and destination country. We will reply within 8 hours.
40mm Round Self-Inking Stamp FAQ
Common questions about the 40mm round self-inking stamp, logo customization, samples and bulk orders.
1. What is the impression size of this stamp?
The R-40 produces a round 40mm diameter impression. It is a popular size for company seals that combine a central logo with circular company name text.
2. Can I add my own logo?
Yes. Send your logo and text as a vector file (AI, PDF or CDR) or a clear image. We engrave the die from your artwork and send a free digital proof within 3 days before production.
3. Can I customize the body color?
Yes. Standard housing colors ship from stock, and custom shell colors can be produced for bulk orders. Ink pads are available in black, blue, red, green and violet.
4. Is the ink pad replaceable?
Yes. The ink pad slides out and can be replaced in seconds. Replacement pads for the R-40 are available for repeat bulk supply.
5. Can I order a sample?
Yes. After artwork confirmation we prepare the logo proof in 3 days, and a physical sample takes 3 days. Sample cost and courier details are confirmed with your quotation.
6. Do you offer private label packaging?
Yes. We produce printed color boxes, header cards, inserts and barcode labels under your brand. Private label programs cover both the stamp and the packaging.
7. What is the MOQ?
The standard MOQ is 100 pcs per design with your custom logo or plate text. Different sizes and models can be mixed in one order.
8. How do I request a quotation?
Send the size, quantity, logo file and destination country through the quote form on this page, by email or on WhatsApp. We reply within 8 hours on working days.