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21 x 30 cm - #2 Black Bubble Envelopes

PRONTO

Color: Black / Polyethylene

Variant

Price:

$28.72

Quantity:

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Specifications:

Dimensions: 21 × 30 cm
Length: 21 cm
Height: 30 cm
Opening: 14 cm
Material: Polyethylene
Closure Type: Self-adhesive flap
Adhesive Type / Activation: Hot Melt / By Pressure
Bubble Size: 5 mm
Model: #2
Color: Black
Units: 100 envelopes
Water Resistance: Yes
Recyclable: Yes

Key Features:

Durable polyethylene exterior with 5 mm bubble cushioning for impact protection
Permanent self-adhesive seal for secure, tamper-resistant shipping
Water-resistant construction helps protect contents from moisture
Sleek black finish for a professional, discreet presentation
Lightweight design helps reduce postage costs
Ideal for documents, photos, books, and other small or fragile items

Description:
These #2 black bubble mailers (21 × 30 cm) are designed for reliable, professional shipping. The polyethylene exterior and 5 mm bubble lining cushion contents against shocks and abrasion, while the pressure-activated hot-melt flap creates a strong, long-lasting seal. Water-resistant and lightweight, they’re suitable for confidential, business, or personal shipments.

How to Use:

Choose an envelope that fits your item, leaving enough space to seal securely.
Place the item inside, centered and cushioned by the bubble lining.
Remove the adhesive liner and press the flap firmly to seal.
Label the package with recipient details and ship via your preferred courier.

About Our Products

How do I know what box size is perfect for my product?

1. Measure the product (length, width, height) with enough space for padding or protection.

2. Search our catalog for the box with suitable internal dimensions.

3. If you need advice, our Sales team can guide you.

Can I make a box with the exact measurements I need?

Yes. We carry plain corrugated boxes in most categories (white, regular, and tabbed). For custom sizes, please contact us to review minimum availability and production times.

Do you have eco-friendly products?

Yes, we're constantly adding more sustainable options. Visit our Eco-Friendly Packaging Collection to see environmentally friendly boxes and materials.

What is the difference between bubble envelopes and rigid envelopes?

• Bubble Mailers: These have an inner layer of bubble wrap that protects fragile and lightweight items. Ideal for electronics or small fragile items.

• Rigid Envelopes: Made with cardboard or a hard material that prevents bending. Perfect for documents or items that don't need to be folded.

What is the difference between regular kraft boxes and white boxes in terms of strength?

White and regular kraft boxes have the same strength if they share the same gauge (single corrugated). The choice is usually more about aesthetics or presentation. White boxes tend to give a cleaner or more premium appearance, while kraft boxes offer a natural, rustic look.

Fast Turnaround

Digital proofs in 48 hours, production in 5–7 days — so you never have to wait long.

One-Stop Shop

Bags, boxes, tape, and labels — everything you need, all in one checkout.

Eco-Friendly Choices

Up to 70% PCR films, biodegradable fillers, and recyclable packaging options.

Real Savings

Peso pricing, tiered volume discounts, and free shipping above threshold.