Insert spacing is the bit of custom candle packaging almost nobody thinks about until a box of cracked jars comes back. Too tight and your packer is jamming candles in and chipping rims; too loose and the jar rattles around in the truck until something gives.
So how much space should you leave for candle box inserts? Below is what we use, by candle type, insert material and how the box is going to travel.
Works for luxury candle boxes, subscription boxes and plain retail cartons alike.
Why Insert Spacing Matters in Candle Packaging
Get the gap right and you get:
• Prevent candle movement during shipping
• Protect glass candle jars from breaking
• Improve unboxing experience
• Maintain premium brand presentation
• Reduce product returns and damage claims
• Keep candles centered inside the box
Honestly, when a candle shipment goes wrong, bad spacing is usually somewhere in the story.
Standard Space to Leave for Candle Inserts
These are the gaps we’d start from (rules of thumb, not law):
Recommended Insert Clearance
• Tight fit (Premium Retail Packaging): 1 to 2mm space
• Standard protective packaging: 2 to 3mm space
• Shipping-heavy packaging: 3 to 5mm space
• Fragile glass candles: 3 to 4mm space
• Luxury rigid candle boxes: 1 to 2mm space
That’s the gap between the candle and the insert wall, per side.
Example:
If your candle diameter is 80mm
Recommended insert cutout size:
• Premium fit: 81 to 82mm
• Shipping protection: 83 to 85mm
Candle Insert Spacing by Candle Type
A tin and a heavy glass three-wick don’t want the same gap. Here’s the breakdown.
Glass Jar Candles
Recommended spacing: 2 to 3mm
Glass is heavy and it chips, so you want a hair of room or the insert squeezes the jar and you get pressure cracks.
Best insert materials:
• EVA foam
• Cardboard inserts
• Molded pulp inserts
• EPE foam
Tin Candles
Recommended spacing: 1 to 2mm
Tins can take a knock. Go tighter.
Best insert materials:
• Cardboard inserts
• Paperboard inserts
• Foam inserts
Luxury Candle Jars
Recommended spacing: 1 to 2mm
At this price point the jar should sit dead still when the lid comes off, so keep it snug.
Best insert materials:
• Velvet foam inserts
• EVA foam inserts
• Rigid board inserts
Large 3-Wick Candles
Recommended spacing: 3 to 5mm
Big candles weigh a lot (a 3-wick can easily top a pound), so give them more cushion.
Best insert materials:
• Thick EVA foam
• Molded pulp
• Corrugated inserts
Insert Thickness Recommendations
How thick the insert is matters too.
Recommended thickness:
• Cardboard inserts: 1.5 to 3mm
• Corrugated inserts: 2 to 5mm
• EVA foam inserts: 5 to 15mm
• Molded pulp inserts: 3 to 6mm
With a thicker insert you can afford a slightly bigger gap, since the material soaks up the bumps.
Height Clearance for Candle Inserts
People measure the width and forget the height. Don’t.
Recommended height clearance:
• Top clearance: 3 to 5mm
• Bottom clearance: 2 to 3mm
• Lid clearance (luxury boxes): 2 to 4mm
Otherwise something presses on:
• Candle lid
• Wax surface
• Glass rim
Single Candle vs Multi-Candle Insert Spacing
Single Candle Box
Recommended spacing:
• Side clearance: 2 to 3mm
• Top clearance: 3 to 5mm
Two Candle Box
Recommended spacing:
• Between candles: 5 to 10mm
• Side clearance: 2 to 3mm
Three Candle Gift Box
Recommended spacing:
• Between candles: 8 to 12mm
• Side clearance: 3mm
More jars in one box, more room between them, or they knock into each other every time the box gets dropped.
Shipping vs Retail Insert Spacing
A box that sits on a shelf can be tighter than one going through the mail.
Retail Shelf Packaging
• 1 to 2mm tight fit
• Minimal movement
• Premium presentation
E-commerce Shipping Packaging
• 3 to 5mm spacing
• Shock protection
• Drop protection
Selling online? Design for the shipping box first and worry about the shelf later. Our candle boxes with inserts are set up that way by default.
Insert Design Tips for Candle Boxes
A few things we do on almost every candle job:
Leave Finger Space
Cut a 5 to 10mm finger notch so people can actually get the candle out without tipping the box upside down.
Add Bottom Cushion
A layer of foam or board under the jar takes the hit when the box gets dropped on its base.
Use Double Insert for Heavy Candles
• Top insert
• Bottom insert
One holds the base, one holds the shoulder, and the candle can’t move.
Common Insert Design Mistakes to Avoid
The ones we see most:
• Insert too tight (causes glass breakage)
• Insert too loose (causes movement damage)
• No height clearance
• No bottom cushioning
• Wrong insert material
• No drop-test consideration
How to Measure Candle for Insert Spacing (Step-by-Step)
Step 1: Measure candle diameter
Step 2: Measure candle height
Step 3: Add recommended clearance
Step 4: Choose insert material
Step 5: Create dieline
Example:
Candle size:
Diameter: 80mm
Height: 95mm
Insert size:
Cutout diameter: 83mm
Insert height: 98mm
Best Insert Materials for Candle Packaging
What most candle brands end up using:
• EVA foam inserts
• Cardboard inserts
• Corrugated inserts
• Molded pulp inserts
• Paperboard inserts
Foam protects best, board is cheapest and easiest to recycle, pulp sits kind of in the middle.
Premium Candle Packaging Insert Styles
Popular insert styles:
• Die-cut inserts
• Foam inserts
• Molded pulp inserts
• Divider inserts
• Platform inserts
Which one? Depends on the candle weight and the box style, really.
Pro Packaging Tip (Used by Premium Candle Brands)
If you just want one setup that works, this is it:
• 2mm side clearance
• 4mm top clearance
• Foam bottom padding
Snug enough to look premium, loose enough to survive the courier.
FAQs About Candle Box Insert Spacing
How tight should a candle insert be?
Snug, not tight. For most candles 2 to 3mm a side works.
Should candle inserts be tight or loose?
Snug. Tight squeezes the glass, loose lets it rattle.
What is the best insert material for candle boxes?
EVA foam if protection comes first, cardboard if cost or recycling matters more. Those two cover most jobs.
Do luxury candle boxes require inserts?
We’d say yes. Without one the jar slides around a rigid candle box and the whole look falls apart.
How much height space should I leave in a candle box?
About 3 to 5mm above the lid, so the box top isn’t pressing down on it.
Why Choose The Pioneer Packaging for Custom Candle Inserts
At The Pioneer Packaging we cut inserts to your actual jar, not a stock size.
What you get:
• Insert design for your jar
• Free dieline and artwork setup
• A few insert materials to pick from
• Low minimums, often around 50 boxes depending on the style
• Production in 10 to 12 business days after proof approval
Send us the jar size and how you ship, and we’ll work out the gaps with you.
Get Custom Candle Boxes with Perfect Inserts
Stuck on the insert?
Get in touch and you’ll get:
• A quick chat about your candle
• A digital proof before anything prints
• Free design help
• Lower per-box pricing as quantity goes up
And if you’re still picking a box size, our guide on what size box you need for candle packaging helps.
Final Thoughts
For most jobs, 2 to 3mm a side. It shifts with:
• Candle type
• Insert material
• Shipping method
• Packaging style
Get it right and the candle shows up whole and looks good when the lid comes off.
It’s a small detail. It’s also the one customers notice when it’s wrong.
Need a hand with candle packaging? Send us your jar size and we’ll sort out the insert with you.
Keep Reading
Ready to order? Start with custom mailer boxes and product packaging boxes. For more background, read how much do custom candle boxes cost? and candle box dimensions guide: standard sizes for every candle type.