Parcel locker box sizes: how to choose the right one?

Currently, six parcel locker networks operate in Latvia – Omniva, DPD, Pasts, Unisend, Venipak, and Smart Posti. Each of them uses different parcel box sizes, and there is no unified standard. This means that a shipment that fits into an S-size compartment in one network may be classified as M-size in another, resulting in a higher delivery cost.

This creates a challenge for businesses looking to reduce delivery costs – in order to remain flexible, warehouses often need to keep a variety of parcel box sizes in stock. This increases both costs and logistical complexity.

Most common parcel locker sizes in Latvia

Parcel boxes: key strategies for cost optimization

Different parcel locker sizes force companies to make strategic decisions about their box assortment. There are four main approaches to solving this problem:

1. Wide warehouse assortment of boxes

The company keeps boxes suitable for every parcel locker network – from S to L sizes. This ensures maximum flexibility but increases warehouse costs and space requirements.

2. Standardization to 2–3 box sizes

By choosing a few universal sizes that fit the most frequently used networks, it is possible to optimize costs and reduce the risk of returns. This is the most common solution for medium-sized e-commerce businesses.

3. Smart combination with protective packaging

Slightly larger boxes are used, with empty space filled by lightweight and recyclable protective packaging (e.g., air cushions). This reduces the risk of damage without losing flexibility in sizes.

4. PAKFUL universal boxes

A practical solution for businesses that don’t want to maintain a wide warehouse assortment is the use of universal boxes. PAKFUL has developed box sizes tailored to multiple parcel locker networks simultaneously – Omniva, DPD, Latvijas Pasts, Unisend, Venipak, and Smart Posti.

Practical tips for choosing parcel boxes for Latvian e-shops

Small volume (up to ~100 shipments per month)
For niche e-shops that usually work with only one courier (e.g., Omniva), two sizes – M and L – are enough. However, if the company plans to grow, universal boxes are the smarter choice from the very beginning, as they help avoid excess inventory and simplify logistics.

Medium volume (100–500 shipments per month)
This is the most common segment in Latvia – 5 to 20 parcels per day, usually with one or two couriers. At this stage, standardization with 2–3 sizes (S, M, L) is typical. However, switching to universal boxes already brings clear benefits – packing becomes simpler, error risk decreases, and it is easier to change couriers depending on the price.

Large volume (500+ shipments per month)
For larger retailers working with several couriers and processing 20–50+ parcels daily, universal boxes are the optimal choice. They can cut costs almost in half, free up warehouse space, and preserve flexibility by always allowing the choice of the cheapest courier.

Universal parcel boxes: cost savings and sustainable packaging

Using universal boxes means not only cost reduction but also a smaller environmental footprint.

◼️ Less waste – more efficient use of boxes, fewer leftovers, and reduced inventory of unsuitable sizes.
◼️ Lower CO₂ emissions – fewer inventory volumes mean less transport and fuel consumption.
◼️ Easier recycling – standardized cardboard sizes make reuse and recycling simpler.
◼️ Better brand image – customers are more likely to choose businesses offering eco-friendly packaging.

Case study: how a Latvian e-shop reduced logistics costs with universal boxes

In autumn 2024, the Latvian e-shop serenity.lv abandoned bubble wrap and switched to air packaging – air cushions and protective film.

In early 2025, the company added another parcel locker network and reduced its assortment from four different box sizes to two universal sizes.

Result: costs dropped by nearly half, packing became faster, and warehouse stock management simpler and more sustainable.

Conclusions: how to choose the right parcel box to cut costs

The right box size model is a key factor in reducing delivery costs and ensuring safe delivery to customers. Different parcel locker networks in Latvia create complexity, but solutions exist – from broad assortments to universal boxes.

PAKFUL universal boxes offer the chance to lower costs, simplify logistics, and at the same time reduce environmental impact. They are a practical solution for businesses that want to operate more efficiently and remain competitive in the market.

If you would like to learn more about universal boxes and find the best solution for your business, contact us – we will help you optimize your packaging process.

Email: veikals@pakful.lv
Phone: +371 26660018