What are 4" x 6.5" labels used for?

4" x 6.5" is an extended-length shipping label format used for international shipments with longer customs declarations (CN22/CN23 forms), FedEx and UPS international labels with extended routing data, hazmat shipping labels with required warnings, and any application requiring more vertical space than a standard 4" x 6" label.

When should I use 4" x 6.5" instead of standard 4" x 6"?

Choose 4" x 6.5" when your shipment requires extra label real estate — international shipping with customs forms, FedEx and UPS international shipments with extended routing or service data, hazmat shipping with required warning panels, or high-detail labels combining shipping info with branding or marketing copy. For domestic USPS, Amazon, eBay, Etsy, and Shopify shipping, standard 4" x 6" is sufficient.

No. These are direct thermal labels — the printer's thermal head creates the image directly on the heat-sensitive label. Ribbons are only needed for thermal transfer printers.

Ecotherm 4" x 6.5" direct thermal shipping labels — 6-roll case on 1" core, 75gsm matte white, perforated.

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Ecotherm 4" x 6.5" Direct Thermal Shipping Labels — 1" Core Rolls

Name: Ecotherm 4" x 6.5" Direct Thermal Shipping Labels — 1" Core Rolls
SKU: ECOTHERM15156-6
Price: 87.99 USD
Availability: InStock

EcothermSKU: ECOTHERM15156-6

Pack Size: 6 Rolls (380 Labels Per Roll - 2280 Labels)

Price:

$87.99

Stock:

In stock

Quantity:

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Width: 4"
Length: 6.5"

Label Size: 4" x 6.5"
Inner Core Of Roll: 1" Core Rolls
Print Method: Direct Thermal
Color: White
Material: Paper
Perforations: Perforated
Adhesive: Permanent Hot Melt
Labels Across: 1
Sold By: Sold By The Case

Ecotherm 4" x 6.5" direct thermal labels are 75gsm matte white paper labels with permanent hot melt adhesive, manufactured for shipping, fulfillment, and carrier-compliant address applications and compatible with all major direct thermal desktop printers. Built for daily use across e-commerce, retail, warehouse, and industrial environments.

Specifications

Face stock: 75gsm direct thermal paper, matte finish, white
Adhesive: permanent hot melt
Liner: 60gsm white glassine
Configuration: single row, perforated, gap sensing, 1" core
Print method: direct thermal only — no ribbon required (not for thermal transfer printers)
Service temperature: 5°F to 149°F (−15°C to 65°C)
Minimum application temperature: 50°F (10°C)
Shelf life: 1 year at 73°F (23°C) / 50% relative humidity
Performance: loop tack ≥14 N; 90° peel adhesion ≥7 N/25mm
Test methods: GB/T 451.2, GB/T 7974, FTM2, FTM9

Common applications

Shipping and fulfillment labels with extra label area
Customs and international shipping labels
E-commerce parcel and carton labels
Return shipping labels
Carrier-compliant address labels

Surface compatibility

Adheres reliably to corrugated cardboard, paperboard, glass, and most rigid plastics greater than 1" / 25mm in diameter. Not recommended for PVC surfaces, bottles 1" / 25mm or smaller in diameter, or applications requiring direct food contact (suitable for non-direct-contact food, medical, and cosmetic packaging).

Printer compatibility

Compatible with major direct thermal desktop printers including Zebra (ZD220d, ZD230d, ZD420d, ZD421d, ZD620d, ZD621d, GK420d, GX420d, ZP450), Rollo (X1040, X1038, X1036), MUNBYN (ITPP941, ITPP130, RW402B, P44S), DYMO LabelWriter 4XL, JADENS (JD-168, JD-268, JD-328BT, JD-468BT), POLONO (PL60, PL420, PL70E), iDPRT (SP410, SP420, SP450), Phomemo (PM-241-BT, D520-BT, PM-246S), Arkscan (2054A, 2054K, 2054N, 3044C), TSC (DA210, DA310), Citizen (CL-S521, CL-E321), Bixolon (SLP-DX420), and Godex (DT4x). For the full verified list, see the Printer Compatibility page. Not compatible with thermal transfer printers, DYMO 5XL or 550-series, or Brother QL-series cartridge printers.

Direct replacement for

These labels are a direct replacement for part numbers RDT4-400650-1P, RD-4-65-230-1, RD-4-65-380-1.

Shipping and ordering

Free shipping from Amazon's US fulfillment centers. Prime members can check out with Buy with Prime; the delivery date shown below the button is Amazon's live estimate for your address. Volume pricing applies automatically on case quantities — see variant options below for available pack sizes.

BPA-free and BPS-free: the white direct thermal facestock is independently tested by SGS (June 2026) with both BPA and BPS not detected — a confident choice where material safety matters.

What are 4" x 6.5" labels used for?: 4" x 6.5" is an extended-length shipping label format used for international shipments with longer customs declarations (CN22/CN23 forms), FedEx and UPS international labels with extended routing data, hazmat shipping labels with required warnings, and any application requiring more vertical space than a standard 4" x 6" label.
Will these 4" x 6.5" labels fit my printer?: These 4" x 6.5" labels on 1" cores fit direct thermal desktop printers with gap sensing, including Zebra (ZD220d, ZD230d, ZD420d, ZD421d, ZD620d, ZD621d, GK420d, GX420d, ZP450), Rollo (X1040, X1038, X1036), MUNBYN (ITPP941, ITPP130, RW402B, P44S), DYMO LabelWriter 4XL, JADENS (JD-168, JD-268, JD-328BT, JD-468BT), POLONO (PL60, PL420, PL70E), iDPRT (SP410, SP420, SP450), Phomemo (PM-241-BT, D520-BT, PM-246S), Arkscan (2054A, 2054K, 2054N, 3044C), TSC (DA210, DA310), Citizen (CL-S521, CL-E321), Bixolon (SLP-DX420), and Godex (DT4x). For the full verified list, see our Printer Compatibility page. Not compatible with thermal transfer printers, DYMO 5XL or 550-series, or Brother QL-series cartridge printers. Check your printer's maximum label length, then set the label length and calibrate gap sensing if it was previously configured for standard 4" x 6" labels.
When should I use 4" x 6.5" instead of standard 4" x 6"?: Choose 4" x 6.5" when your shipment requires extra label real estate — international shipping with customs forms, FedEx and UPS international shipments with extended routing or service data, hazmat shipping with required warning panels, or high-detail labels combining shipping info with branding or marketing copy. For domestic USPS, Amazon, eBay, Etsy, and Shopify shipping, standard 4" x 6" is sufficient.
Do I need a ribbon?: No. These are direct thermal labels — the printer's thermal head creates the image directly on the heat-sensitive label. Ribbons are only needed for thermal transfer printers.

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Ecotherm 4" x 6.5" Direct Thermal Shipping Labels — 1" Core Rolls

Specifications

Description

Specifications

Common applications

Surface compatibility

Printer compatibility

Direct replacement for

Shipping and ordering

Frequently Asked Questions

Payment & Security

Ecotherm 4" x 6.5" Direct Thermal Shipping Labels — 1" Core Rolls

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