Verified Zebra Compatibility

Thermal Shipping Labels for Zebra ZD421 Printer

The Zebra ZD421d is one of the UK's top commercial desktop thermal shipping label printers. Our 4x6 inch (100x150mm) direct thermal rolls fit the internal roll bay perfectly on standard 25mm cores with zero jams or feeding issues.

100% Guaranteed Zero-Jam Compatibility

25mm (1 inch) cardboard core

Direct Thermal (No Ink or Ribbon)

Flagship UK Specification 100% In Stock Leicester UK

SKU: TL-4X6-DT-500

4x6 Direct Thermal Labels 500 Sheets Per Roll Compatible with all Printer

The UK standard for direct thermal courier dispatch. Engineered with high-sensitivity thermal paper, premium permanent acrylic adhesive, and clean tear perforations. Fully certified for 100% direct thermal printer compatibility without ink or ribbons.

Exact Product Technical Specifications

Label Dimension: 4 x 6 inches (100 x 150 mm)

Sheet/Label Quantity: 500 Labels / Sheets

Roll Core Diameter: 25 mm (1 inch Standard Core)

Print Technology: Direct Thermal Paper (100% Inkless - No Ribbon Required)

Adhesive Type: Commercial Permanent Acrylic (Smudge & Moisture Resistant)

Perforation: Standard Perforated Line Between Each Label

100% Printer Brand Compatibility Guaranteed

Zebra (ZD421d, ZD420d, GX420d, GK420d)
Brother (TD-4410D, TD-4520TN, QL-1110NWB, TD-2120N)
Rollo (Wireless & USB Commercial Thermal Printers)
Munbyn (ITPP941, Realwriter 408B, Bluetooth Models)
Dymo (LabelWriter 4XL, 5XL Wide Format Printers)
Phomemo (PM-246 Pro, M04S Desktop Printers)
Citizen, TOSHIBA, TSC, Godex & Standard 4" Thermal Desktop Units

UK Courier Barcode & Logistics Approved

Royal Mail Click & Drop (2D Barcode Standard)
DPD & DPD Local (Shipping & Returns)
Evri / Hermes (ParcelShop & Courier Dispatch)
Amazon Prime & FBA Shipping Consignments
Yodel, FedEx, DHL Express & UPS Parcels

VOLUME TIERED PRICING Standard VAT Invoice Included

1-4 Rolls

£8.99

5-19 Rolls

£6.99

20-49 Rolls

£5.49

50+ Rolls

£4.99

Ready to Dispatch Next Working Day

Order 4x6 Direct Thermal Labels (500 Sheets/Roll)

Hardware Verification

Zebra ZD421 / ZD421d Compatibility Specs

Technical verification data for optimal label feeding and barcode clarity.

Max Print Width

4.09 inches (104 mm)

Fits standard 4" (100mm wide) parcel shipping label rolls.

Core Support

25mm (1 inch) cardboard core

Standard 25mm cardboard core fits native internal spindles.

Printing Tech

Direct Thermal (No Ink or Ribbon)

Zero ink, ribbon, or toner required. Instant heat printing.

Key Compatibility Highlights for Zebra ZD421 / ZD421d

Exact fit for internal Zebra ZD421 roll spindle (25mm core)

Smudge-proof top-coated direct thermal sensitive paper

Royal Mail, DPD, Evri, Yodel, and Amazon FBA approved format

High initial-tack permanent acrylic adhesive for corrugated boxes

Stock Ready

Compatible Label Rolls for Zebra ZD421 / ZD421d

Direct thermal rolls tested and approved for Zebra ZD421 / ZD421d printers.

4x6" (100x150mm) Direct Thermal Shipping Labels — 500 Labels/Roll

Industry-standard 4x6 inch (100x150mm) direct thermal shipping label rolls. Top-coated, smudge-proof paper with strong permanent adhesive for all UK couriers.

Universal Compatibility: Fits Zebra, Rollo, Munbyn, Brother, Dymo 4XL & Phomemo Printers

Single Roll Price:

£4.99ex VAT

Bulk Rate (50+ Rolls):

£4.00ex VAT / roll

View Detailed Specs Select Variations & Buy Now

Zebra ZD421 / ZD421d Thermal Label FAQs

Are these 4x6 labels 100% compatible with the Zebra ZD421 / ZD421d? +

Yes, 100% guaranteed! Our 4x6 inch (100x150mm) direct thermal label rolls feature a standard 25mm (1 inch) core and 127mm outer roll diameter, fitting natively into the Zebra ZD421 / ZD421d without jams or sensor misalignments.

Does the Zebra ZD421 / ZD421d require ink ribbons for thermal labels? +

No. The Zebra ZD421 / ZD421d uses direct thermal printing technology. The printer head applies direct heat to our heat-sensitive thermal paper to produce clear black barcodes without ink, toner, or ribbon.

Are these labels approved for UK couriers on Zebra printers? +

Yes! Our rolls are 100% approved for Royal Mail Click & Drop, DPD, Evri, Yodel, Amazon FBA, and ParcelForce dispatch.