Grey vs Coloured Mailing Bags: Which Should You Choose?

Once you've worked out the size of mailing bag you need, the next decision is colour. It might seem like a minor detail compared to size or thickness, but colour affects how your parcels look on arrival, how your brand comes across, and in a few cases, how practical the bag is for what you're sending. Most UK sellers default to grey without thinking about it much further, and for good reason, but it's worth knowing what the alternatives offer before assuming grey is automatically right for you.

This guide covers the difference between grey and coloured mailing bags, when each makes sense, and how to decide what's right for your business or selling habits.

Grey mailing bags: the default for a reason

Grey is by far the most widely used mailing bag colour in the UK, and it's the standard choice for the majority of clothing sellers, e-commerce businesses and marketplace sellers on Vinted, Depop and eBay. There are practical reasons it's become the default rather than it simply being what's always been available.

Grey film is fully opaque, which means the contents are completely hidden from view, important for privacy and for keeping items looking neat regardless of what's inside. It has a neutral, professional appearance that doesn't clash with any branding you might add via a label or printed sticker. It's also typically the cheapest option, since it's the highest-volume colour produced and doesn't carry any premium for being a less common shade.

For most sellers, particularly those just starting out or sending a high volume of standard parcels, grey is the sensible default. It does the job without drawing attention to itself, and there's no real functional downside to choosing it.

Coloured mailing bags: pink, purple, green and blue

Beyond grey, mailing bags are also available in pink, purple, green and blue. These perform exactly the same job as grey bags in terms of protection, opacity and waterproofing. The film, the seal, the thickness, none of that changes. The only difference is the colour of the bag itself.

Where coloured bags earn their place is in presentation and branding. A pink or purple mailing bag arriving on a customer's doorstep creates a more distinctive, considered impression than a standard grey bag, which matters for boutique clothing brands, gift businesses, or any seller who wants their packaging to feel like part of the product experience rather than an afterthought.

Pink mailing bags

Popular with fashion, beauty and gift-focused sellers who want a softer, more feminine aesthetic. Works well for boutique clothing brands, accessories sellers and anyone building a brand around a particular look or customer base where pink fits naturally.

Purple mailing bags

A slightly more premium or distinctive feel than pink, often used by sellers who want their packaging to stand out without going for a more conventional colour like grey or blue. Works well for jewellery, accessories and gift-led businesses.

Green mailing bags

Often chosen by sellers who want their packaging colour to reinforce an eco-conscious or natural brand identity, even though the functional environmental credentials of the bag itself, recyclability and material, are the same regardless of colour. Also a practical choice simply as a way to visually distinguish stock or order types if you're running more than one product line.

Blue mailing bags

A versatile, gender-neutral option that suits a broad range of brands without leaning particularly masculine or feminine. Popular for general e-commerce, homeware, and any seller who wants something a bit more distinctive than grey without committing to a strongly themed colour like pink or purple.

Does colour affect anything practical?

Functionally, no. Across grey and the coloured options, the bags are made from the same recycled LDPE film at the same thickness, with the same self-seal closure and the same waterproof, opaque properties. Choosing a colour is a presentation decision, not a protection or durability decision. Whatever colour you choose, the item inside will be just as well protected as it would be in any other colour.

The one practical consideration is cost. Coloured bags are sometimes priced slightly differently from grey, depending on production volume for that specific colour, so if cost per bag is the main factor for a high-volume seller, it's worth checking current pricing across the colours you're considering rather than assuming they're identical.

When does it make sense to use coloured bags?

A few scenarios where moving away from grey is worth considering:

If you're building a brand where packaging is part of the customer experience, such as a boutique clothing label, a gift business, or a subscription box service, a coloured bag adds a level of polish that grey doesn't. This matters more for businesses where repeat purchases and word of mouth depend partly on how the unboxing feels.

If you're running multiple product lines or order types and want a simple visual way to tell them apart at a glance, without relying purely on labels, using different colours for different categories can speed up sorting and packing on a busy bench.

If you want your packaging to be instantly recognisable to repeat customers, a consistent, distinctive colour choice (pink for one brand, blue for another) builds a visual association over time in a way that grey, being so common across the market, doesn't achieve as easily.

When grey is still the better choice

If you're optimising purely for cost and your customers aren't likely to notice or care about packaging colour, grey remains the most sensible default. This applies to most general e-commerce, resale, and high-volume dispatch operations where the priority is getting items out reliably and cheaply rather than building a packaging-led brand impression.

Grey is also the safer choice if you're not sure yet what your brand identity looks like. It's neutral enough to work for almost any product category, which makes it a sensible starting point while you're still working out your wider branding, with the option to switch to a coloured bag later once you have a clearer sense of what fits.

Mixing grey and coloured bags

There's no requirement to pick one colour and stick to it exclusively. Some sellers use grey as their main workhorse bag for standard orders and reserve a coloured bag for higher-value orders, gift purchases, or specific product lines where the extra presentation effort is worth it. This gives you the cost benefit of grey for the bulk of your volume while still having a distinctive option available where it adds genuine value.

How to choose

If you're undecided, a practical way to think about it: start with grey if cost and simplicity matter most, or if you're not yet sure about your brand direction. Move to a coloured option once you have a clearer sense of your branding, your customer base, or once you want a simple way to visually separate stock or order types. Whichever you choose, the protection and quality of the bag itself doesn't change. Colour is entirely about how the parcel looks, not how well it does its job.

You can browse the full range, including grey mailing bags, pink mailing bags, purple mailing bags and blue mailing bags, on our mailing bags page. Most colours are available in the same core sizes, so switching between them doesn't mean compromising on fit for what you're sending.