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Product description
Trick-or-treating happens after dark, and that is precisely when most pet costumes stop doing anything at all. This one works the other way round. The spider detail is luminescent, so it charges under ordinary light during the day and then shows up on an unlit street in the evening, when everybody is actually out. It is the rare novelty item that gets better as the light goes.
Glow-in-the-dark material works by absorbing light and releasing it slowly, which means the brightness is a curve rather than a constant: strongest in the first stretch after it has been sitting under a lamp, then fading over the hour that follows. Leaving it somewhere bright for a while before you head out makes a visible difference. Three sizes are listed, S, M and L, all carrying the same glowing spider design.
- Luminescent spider detail that glows in the dark
- Three sizes: S, M and L
- One design across all sizes
- Charges under ordinary household light
- Shipped tracked to the UK, typically 7 to 12 days
- Covered by our 30-day returns promise
Two things worth knowing. The glow fades over the course of an evening and needs light to recharge, so do not plan on it lasting a whole night out. And costumes are for short supervised periods only, so never leave one on an unattended dog or during rough play, and check the size guide, since chest measurement decides the fit rather than your dog's weight.
What the options mean. Sizes run from S to L — £15.99 for the smallest, £17.99 for the largest.
Who it's for: Anyone taking a dog out on Halloween evening who wants a costume that reads in the dark rather than one that disappears at dusk.
Why we chose it
Trick-or-treating happens after dark, which is exactly when most pet costumes stop doing anything. The spider detail charges under daylight and shows on an unlit street in the evening. Chest measurement decides the fit, not your dog's weight.
— Matt, founder
Material & product details
- Material
- Cloth
Size guide & how to measure
Dog coats and jumpers are sized mainly by back length, with chest girth as a second check. Back length matters most for coverage.
How to measure
- Back length: measure along the spine from the base of the neck (collar area) to the base of the tail.
- Chest: measure around the widest part of the ribcage, behind the front legs.
- If the two measurements suggest different sizes, choose by back length and allow for the chest.
| Size | Typical back length | Typical chest |
|---|---|---|
| XS | 20–25 cm | 30–40 cm |
| S | 25–32 cm | 38–50 cm |
| M | 32–40 cm | 48–62 cm |
| L | 40–50 cm | 60–76 cm |
| XL | 50–60 cm | 74–92 cm |
Ranges are approximate and vary by style. Always check this product’s Specifications for its exact measurements.
Delivery, returns & payment
Delivery
Tracked UK delivery — your estimated arrival date is shown above and updates automatically. Standard delivery £2.99, and free on orders over £39. Full details on our delivery information page. Delivery information
Returns
30 days to change your mind, no interrogation. Items need to be unused (sensory products unopened, for hygiene). Full details on our delivery & returns page.
Payment
Secure checkout by Stripe — cards, Apple Pay, Link and Klarna. We never see or store your card details.
Common questions
Which options can I choose from?
S / Glowing spider, M / Glowing spider, L / Glowing spider. Pick one above before adding to your basket.
How long does delivery take?
Your estimated delivery date is shown above and updates automatically. UK orders are sent tracked — standard delivery is £2.99, and free on orders over £39.
How do I track my order?
As soon as your order is dispatched we email you a tracking link, so you can follow it all the way to your door.
How do I choose the right size?
Use the size guide above to measure your pet, then pick the size whose range your measurement falls within. If you’re between sizes, size up. Still unsure? Email us before you order.
What is it made from?
Cloth. Full specifications are listed above.
What if I need to return my order?
You have 30 days from delivery to change your mind. Just email us with your order number and we’ll send the return steps the same working day — see our delivery & returns page for details.
Glow in the Dark Spider Costume
From £15.99
Delivery £2.99 · free over £39A luminescent spider costume that glows once the lights go down.
Will this fit my dog?
Save your dog’s measurements once, then compare them with coats, harnesses and collars while you shop.
Size
From £15.99
30-day returns · Free return postage
Secure checkout by Stripe · Card, Apple Pay & Klarna
“Really nice family business, no problems at all.” — Tracey
Two things worth knowing
The glow fades over the course of an evening and needs light to recharge, so do not plan on it lasting a whole night out. And costumes are for short supervised periods only, so never leave one on an unattended dog or during rough play, and check the size guide, since chest measurement decides the fit rather than your dog's weight.
Why shop with Giddy Pets?
Why buy from Giddy Pets?
- Carefully selected by pet ownersEvery product is chosen and quality-checked by people who actually live with dogs, cats and small pets.
- Tracked delivery on every orderUK delivery with tracking as standard — and it’s free when you spend over £39.
- UK customer supportReal, UK-based humans read every email — usually Matt, the founder. No bots, no ticket numbers.
- Easy returns30 days to change your mind, no interrogation. If it’s not right, we’ll make it right.
Not ready to buy? Free guides & a 2-minute pet quiz
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This is an everyday pet product, not a veterinary treatment. For any health concerns, please speak to your vet.
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What customers say about Giddy Pets
10 reviews on Trustpilot, all five stars · TrustScore 4.3
“Really nice family business, no problems at all.”
“Genuine helpful service that personalised my order.”
“It always comes on time and without a fuss, would definitely recommend.”
Shop-wide reviews from customers who bought from us, collected by Trustpilot. Product-specific reviews appear here once a buyer leaves one.
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