Switory Parcel Bags Mailing 12x16 Inch Self-Seal Waterproof Postal Bags (100 Pack) – Grey

What these parcel bags are for

Switory Parcel Bags Mailing 12x16 inch are self-sealing, plastic mailing bags designed for everyday shipping and packaging. If you send out parcels regularly (small shop orders, online sales, posting clothes or accessories), these can be a practical way to protect items from basic grime and typical “unplanned weather” during transit.

The key thing here is the size: 12x16 inch gives you a middle-of-the-pack option for thinner goods, rather than bulky shipments. On paper, they’re aimed at straightforward packing where you want quick closure and less hassle than traditional adhesives or tape.

Key features that matter in real use

These bags are made from polythene-style polymer material and are positioned as tough enough for shipping handling. They’re also described as waterproof and oilproof, which is useful if parcels sometimes get caught in rain, damp corridors, or dusty warehouse floors.

The closure is self-adhesive (self-seal) with a pressure-sensitive strip. You peel and seal the bag after packing, and the design includes a tamper-evident element, so it’s not just a simple fold-and-go. That tends to be what buyers care about most when sending packaged goods: a seal that stays put and doesn’t look easily “reset” once closed.

One practical example: you put a folded garment or a couple of small accessories inside, peel the strip, press along the closure, and you’ve got a sealed outer layer ready for posting. It’s a simple workflow—useful when you’re packing more than one order in a session.

Size, quantity and what to expect

This listing is a 100-pack in 12x16 inch (the base description also references an internal size of 12x16). Buying in multipacks usually makes sense when you already know you’ll use them—think repeat posting or having stock for warehouse/office fulfilment.

That said, it’s not a magic fit for every shipment. Because these are flat mailing bags (not rigid boxes), they can be less forgiving for fragile or bulky items unless your internal packaging supports them.

Where they shine (and where they can fall short)

They look most convincing for protection against dirt and moisture, and for situations where you want lightweight packaging that doesn’t add much bulk. The waterproof and oilproof claims are particularly relevant if your workflow includes outdoor drop-offs or deliveries through less-than-perfect conditions.

However, it’s worth being realistic: if you’re shipping very sharp-edged items, heavy goods, or anything that needs strong structural support, a mailer bag may feel like a budget approach. For delicate electronics or high-value items, you’ll likely want to add extra internal cushioning and wrapping so the bag isn’t carrying the whole burden.

If you prioritise maximum rigidity and impact protection, you may find yourself wanting a different packaging format.

Who it’s for

It makes sense if you’re: - posting smaller items like clothing, accessories, and similar goods - looking for a quick self-seal packaging step for regular dispatch - after a waterproof, oil-resistant outer layer for basic transit protection - managing fulfilment in an office, warehouse, or small business environment

Should you buy it? (Final verdict)

It’s a solid pick if your goal is simple, repeatable packaging for 12x16-inch flat shipments, with a self-sealing closure and outer protection against moisture and grime.

You may want to skip it if you’re sending bulky, heavy, or highly fragile items that need a rigid structure, or if your shipments require more specialised protective packaging. Also, if 12x16-inch is too tight for what you dispatch most days, the multipack approach can leave you with unused stock.

Mini FAQ

Is the bag self-sealing or does it need extra tape?

It’s described as self-sealing with a pressure-sensitive adhesive strip, so in normal use you should be able to seal the bag without adding additional tape.

Are these bags waterproof?

The base description states they are waterproof (and also oilproof), aimed at keeping contents safer if there’s moisture involved.

What kinds of items are these best for?

The description specifically points to shipping clothes and packaging a range of goods (including electronics and other goods), but the size suggests they’re more suitable for smaller, flatter shipments.

How many bags are in the pack?

The listing is for 100 bags.

Do I need to worry about the closure holding up in wet conditions?

It’s described as water and dirt resistant due to the adhesive and closure approach, but you’ll still want to seal properly along the strip for best results.