18x23 Thermal Bubble Mailers – #9 Foil Padded Envelopes Pack of 50
18x23 Thermal Bubble Mailers – #9 Foil Padded Envelopes is backordered and will ship as soon as it is back in stock.
Description
Description
Bulk 18x23 thermal bubble mailers, industry size #9 (18" x 23" outside, 18" x 22" usable): one of our largest insulated mailers, for multi-item cold shipments, larger boxed products and meal-kit style orders packed with gel packs. Silver foil exterior, bubble lining, 50 mailers per case.
Specifications
- Outside dimensions: 18" x 23"
- Usable space: 18" x 22"
- Industry size: #9
- Pack quantity: 50 mailers per case
- Exterior: Reflective silver metallic foil
- Lining: Thermal bubble cushioning
What fits in an 18x23 thermal mailer
- A box up to about 13" x 17" and 5" thick, gel packs included
- Bulk chocolate, baked goods, cosmetics or supplement orders
- Multi-item kits and orders that need to stay cool in transit
Sizing tip: add the thickness (gel packs included) to the width and to the length; both totals have to fit inside 18" x 22". A 13" x 17" x 5" box comes to 18" x 22" — a snug fit.
Packing a large thermal mailer
A bigger mailer holds more product and more air, so pack enough frozen gel packs for the whole load and fill the empty space. The foil and bubble layers slow warming; they don't cool on their own.
18x23 vs. nearby sizes
- 15x17 #8 thermal mailers (15" x 17" usable): one size down.
- 24x20 #10 thermal mailers (24" x 20" usable): 24" across and 20" long, for wide items.
- See all thermal mailer sizes.
FAQ
Can a #9 thermal mailer replace an insulated box?
For short trips with enough gel packs it works for many products. Frozen goods, long transit or hot weather usually call for an insulated box.
Why does an 18x23 mailer hold 18" x 22"?
The name is the outside size, the same way our poly bubble mailers are named. The seal flap takes up about 1" of the length, leaving 18" x 22" for your item.
How many come in a case?
50 mailers per case.
Why BulkMailerHQ
- Free U.S. shipping on bulk orders
- Ships fast from our US warehouse
- Volume discounts on case quantities
| Price Per Case | |||
| 1 case | 2–3 cases | 4–5 cases | 6+ cases |
| $78.99 | $76.62 | $75.04 | $72.67 |
Explore All Sizes
| OUTSIDE W x L | Size Image | QTY./ CASE | PRICE PER CASE | |||
| 1 case | 2–3 cases | 4–5 cases | 6+ cases | |||
| 6.5x11.5 |
|
100 | $54.99 | $53.34 | $52.24 | $50.59 |
| 6x7 |
|
100 | $49.99 | $48.49 | $47.49 | $45.99 |
| 8x12 |
|
100 | $59.99 | $58.19 | $56.99 | $55.19 |
| 10x11 |
|
100 | $62.99 | $61.10 | $59.84 | $57.95 |
| 11x16 |
|
50 | $64.99 | $63.04 | $61.74 | $59.79 |
| 12x18 |
|
50 | $69.99 | $67.89 | $66.49 | $64.39 |
| 15x18 |
|
50 | $73.99 | $71.77 | $70.29 | $68.07 |
| 24x21 |
|
50 | $139.99 | $135.79 | $132.99 | $128.79 |
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Bulk 18x23 thermal bubble mailers, industry size #9 (18" x 23" outside, 18" x 22" usable): one of our largest insulated mailers, for multi-item cold shipments, larger boxed products and meal-kit style orders packed with gel packs. Silver foil exterior, bubble lining, 50 mailers per case.
Specifications
- Outside dimensions: 18" x 23"
- Usable space: 18" x 22"
- Industry size: #9
- Pack quantity: 50 mailers per case
- Exterior: Reflective silver metallic foil
- Lining: Thermal bubble cushioning
What fits in an 18x23 thermal mailer
- A box up to about 13" x 17" and 5" thick, gel packs included
- Bulk chocolate, baked goods, cosmetics or supplement orders
- Multi-item kits and orders that need to stay cool in transit
Sizing tip: add the thickness (gel packs included) to the width and to the length; both totals have to fit inside 18" x 22". A 13" x 17" x 5" box comes to 18" x 22" — a snug fit.
Packing a large thermal mailer
A bigger mailer holds more product and more air, so pack enough frozen gel packs for the whole load and fill the empty space. The foil and bubble layers slow warming; they don't cool on their own.
18x23 vs. nearby sizes
- 15x17 #8 thermal mailers (15" x 17" usable): one size down.
- 24x20 #10 thermal mailers (24" x 20" usable): 24" across and 20" long, for wide items.
- See all thermal mailer sizes.
FAQ
Can a #9 thermal mailer replace an insulated box?
For short trips with enough gel packs it works for many products. Frozen goods, long transit or hot weather usually call for an insulated box.
Why does an 18x23 mailer hold 18" x 22"?
The name is the outside size, the same way our poly bubble mailers are named. The seal flap takes up about 1" of the length, leaving 18" x 22" for your item.
How many come in a case?
50 mailers per case.
Why BulkMailerHQ
- Free U.S. shipping on bulk orders
- Ships fast from our US warehouse
- Volume discounts on case quantities
Ordering 20+ cases or a pallet?
Tell us the sizes, colors, quantities and delivery ZIP code, and we'll send a fast, personalized quote. Under 20 cases? Order right here: case discounts up to 8% apply automatically.
