School Locker Dimensions: How to Choose Sizes and Plan Space

What size should school lockers be? The answer depends on what students need to store, their ability to reach the compartments, and how much space is available where they enter and leave. A preschool coat area, an elementary classroom and a secondary-school corridor rarely need exactly the same layout.

There is no single dimension that fits every school locker. The useful way to compare models is to measure width, depth and height separately, check the usable inside space, and calculate how many students can access their belongings during the busiest transition. This guide explains how to do that using examples from the school lockers and wardrobe storage collection at School Furniture by Simplova.

School Locker Dimensions: The Quick Answer

Start with three questions: How big is the item that must fit? How many students need a dedicated space? Where will the storage sit when everyone arrives at once?

• Width: determines the wall space needed and, with the internal layout, the space available to each student.
• Depth: determines whether a packed backpack or winter gear fits and how far the unit projects into a room or corridor.
• Height: affects hanging capacity, overhead reach, supervision and whether a unit can be installed or stacked safely.

A labelled locker dimension is normally the overall exterior measurement unless the manufacturer specifies otherwise. Ask for the usable inside width, depth and height before ordering. Shelves, hooks, frames, doors and base components can reduce that space.

School Locker Size Examples from Our Canadian Catalog

These are verified product dimensions from currently listed School Furniture products, not a universal Canadian school locker standard. They show why comparing just a product name or the number of compartments can be misleading.

Dimensions are shown in inches as listed in the product descriptions. Product options, interior dimensions, finishes and specifications can change. Verify the exact model and current manufacturer drawing before purchase. The 30-inch Constellate height refers to the stack-kit component, not a freestanding finished installation.

How to Measure a School Locker Correctly

1. Measure the backpack or equipment first

Take the largest typical packed backpack, winter coat, boots, sports bag or device case that students actually bring. Record its width, height and front-to-back depth. A locker that holds a folded sweatshirt may be too shallow for a full backpack. Also decide whether items will hang or sit on a shelf.

2. Separate outside dimensions from usable inside space

Do not divide an exterior cabinet width by its number of doors or cubbies and treat the answer as interior clearance. Panels, uprights, hooks and shelves use space. Ask for the internal measurements of the precise compartment configuration. If storage must hold a laptop case or sports equipment, test the real item.

3. Account for what happens when the unit is in use

With open-front compartments, bags may project beyond the front edge if they do not fit completely. With doors, allow for the door swing. With hanging hooks, check the room available below a coat. Plan around the fully occupied arrangement, not an empty furniture footprint.

4. Check the installation route and finished location

Confirm that the assembled unit can travel through doors, around corners and into lifts if applicable. Check ceiling height, baseboards, service outlets and any required wall fixings. Do not assume that two stackable parts can be combined unless the manufacturer lists that specific combination.

Choose Locker Dimensions by Age and Use

Daycare and preschool: low, supervised compartments

Young learners benefit when their assigned belongings are within easy reach and educators can supervise the area. For this use, lower open-front toddler lockers or appropriately installed coat-and-cubby systems may be more practical than tall narrow lockers. Check if the space must hold a change of clothes, winter outerwear, a lunch bag or bedding; those items need different compartments.

Elementary school: backpacks plus Canadian winter gear

For Grades K–6, do not base the selection only on a notebook or an empty backpack. Ask students or staff to demonstrate a typical packed winter-day load. Wet boots and snow pants may need a separate area, and students need room to approach the storage without blocking others. In some schools, a coat wall with separate bag cubbies is more usable than one tall locker for every student.

Secondary school: larger belongings and different access patterns

Older students may carry larger bags, sports equipment and devices, sometimes moving between multiple rooms. Identify whether secure personal storage is a requirement. A product named a locker is not automatically lockable; check the exact door, hasp and lock options. The space plan should also reflect class-change traffic and applicable facilities requirements.

How Much Wall Space Do 24 Students Need?

A quick example shows why dimensions matter as much as the number of spaces. Suppose a class needs 24 individually assigned openings and chooses the four-section Toddler Locker, which has a listed overall width of 48 inches:

1. 24 students ÷ 4 sections per unit = 6 units.
2. 6 units × 48 inches wide = 288 inches.
3. 288 inches ÷ 12 = 24 linear feet of total nominal cabinet width.

That is a capacity-and-width calculation, not an installation plan. A real layout must also account for wall interruptions, corners, clearance at doors, accessibility, traffic and the manufacturer's installation requirements. If the room does not offer a suitable continuous run, compare different configurations or split storage into multiple zones.

For multiple classes using the same hallway, calculate the likely number of students accessing their belongings at the same time, not just the combined enrolment. Storage placed at one narrow choke point can create delays even when every child has a compartment.

Open Storage or Lockable School Lockers?

Security is a separate specification from physical size. Open cubbies can be excellent for supervised early-learning routines but should not be described as secure storage. For example, the Constellate Storage Lockers are open-front interiors and, according to the product specifications, do not accept door kits.

If a school requires controlled access for personal property, ask the supplier to confirm a compatible door-and-lock configuration, key management and any applicable accessibility considerations. For the broader decision between open cubbies and locker-style storage, read our School Cubbies vs Lockers comparison guide.

Seven Questions to Answer Before Requesting a School Locker Quote

• Who uses it? Specify ages or grades and whether students need independent access.
• What goes inside? List the largest actual bag, coat, boot or equipment item.
• How many assigned positions? Include current enrolment and reasonable growth.
• What space is available? Provide wall length, maximum depth, ceiling height, doors and obstacles.
• Is a lock required? Confirm privacy and security needs rather than relying on a product name.
• How will it be installed? Ask about anchoring, wall support, assembly, casters and stacking compatibility.
• When is it busiest? Note arrival, recess and class-change congestion, including accessibility routes.

Where tall cabinets are used in areas accessed by children, review manufacturer stabilization instructions and relevant guidance such as Health Canada's furniture tip-over information. Your facilities team should check the applicable local building, fire and accessibility requirements; there is no universal corridor clearance that can be assumed for every school.

Common Locker Sizing Mistakes

Assuming all “standard lockers” have the same dimensions

Suppliers offer different cabinet constructions, compartment layouts and door formats. Even two products with similar overall dimensions can have different usable interior capacity.

Specifying based on student count alone

Twenty-four openings are not useful if winter coats and backpacks cannot fit. Test the contents, then work backward to compartments and cabinet count.

Ignoring depth and traffic flow

A deeper storage unit projects farther into the room or corridor. Plan for occupied space, turning room, access and any open doors.

Confusing an open-front locker with a secure enclosure

Choose products by the actual hardware and configuration, especially when storing devices or other valuables.

Frequently Asked Questions About School Locker Dimensions

What is the standard size of a school locker?

There is no single standard dimension across every school locker type and manufacturer. Tall personal lockers, sport lockers and low preschool lockers can be very different. Use manufacturer-specific width, depth and height measurements and confirm interior clearance.

How deep should school lockers be for backpacks?

Measure a typical fully packed backpack, including the part that sticks out most, then compare it with the usable internal depth of the proposed compartment. The appropriate depth varies by age group and bag type; exterior cabinet depth alone does not guarantee a fit.

Are preschool lockers smaller than secondary-school lockers?

They often are, particularly in overall height and reach. For example, the Trojan four-section Toddler Lockers listed by School Furniture are 36 inches high, while the Trojan Sport Locker is 78 inches high. These are different products for different storage tasks, not mandatory grade-based dimensions.

How many locker units are needed for 24 students?

If each child needs one assigned compartment and a selected unit provides four, six units provide 24 positions. Recheck each opening's capacity and whether the resulting footprint and access arrangement work in the room.

Can school lockers be installed in a hallway?

Possibly, but suitability depends on the school building, width of the route, traffic, accessibility, fire and egress requirements, and the chosen product's projection and installation. Consult your facilities team and applicable local requirements before specifying a hallway layout.

Are lockers with open fronts lockable?

Not necessarily. Open-front models should be treated as accessible storage unless the manufacturer specifically provides compatible security hardware. The Constellate locker interiors in our current catalog do not accept door kits.

Find School Locker Sizes That Work for Your Space

The right school locker dimensions start with the belongings, not a supposed universal standard. Measure a real bag and winter coat, confirm usable interior clearances, calculate the quantity and total cabinet footprint, and check access during the busiest part of the day.

Explore our Combo Units, Wardrobe Units, Towers & Lockers collection and wider Classroom Storage range. For a quote or layout discussion, share student ages, expected quantities, items to be stored and the dimensions of the available space. Our team can help compare current product configurations for Canadian schools.