Buy Coin Capsules – Precise Protection for Every Coin Size

Coin capsules are the single most important accessory for any precious metals investor. With 52 products at CelticGold covering sizes from 21.5mm to 80mm, there is a correct capsule for every major bullion coin, collector piece and bar format. Clear, rigid plastic construction allows full visual appreciation of the coin without removing it from protection – while shielding it from the fingerprints, moisture and oxidation that permanently reduce resale value.

Why Every Coin Needs a Capsule

When you sell a coin, its condition is evaluated visually. A coin in perfect original condition consistently achieves a better price than one with fingerprint marks or surface scratches. Capsules prevent both – and cost from €0.39 per piece. The investment in a capsule is always recovered at resale.

A capsule that is too tight risks damaging the coin's edge when fitting or removing it. One that is too loose allows movement and inadequate protection. The correct capsule has an inner diameter slightly larger than the coin's outer diameter.

Complete Coin Capsule Size Reference

Gold Coins – Standard Bullion Series

Coin	Size	Inner ⌀	Recommended Capsule
Vienna Philharmonic 1oz	1 oz	37.0 mm	37 mm
Krugerrand 1oz	1 oz	32.7 mm	33 mm
American Eagle 1oz	1 oz	32.7 mm	33 mm
Kangaroo 1oz	1 oz	32.1 mm	33 mm
Lunar III 1oz	1 oz	32.1 mm	33 mm
Maple Leaf 1oz	1 oz	30.0 mm	30 mm
Britannia 1oz Gold	1 oz	32.7 mm	33 mm
Sovereign (full)	1 Sov.	22.05 mm	23 mm
Vienna Philharmonic 1/4oz	1/4 oz	22.0 mm	23 mm
Vienna Philharmonic 1/10oz	1/10 oz	16.0 mm	21.5 mm

Silver Coins – Standard 1 oz

Coin	Inner ⌀	Recommended Capsule
Silver Eagle (US)	40.6 mm	41 mm
Britannia 1oz Silver	38.61 mm	39 mm
Somalia Elephant 1oz	38.61 mm	39 mm
Kookaburra 1oz	40.6 mm	41 mm
Koala 1oz	40.6 mm	41 mm
Silver Maple Leaf 1oz	38.0 mm	39 mm
Silver Vienna Philharmonic 1oz	37.0 mm	37 mm
Lunar III 1oz Silver	40.6 mm	41 mm

Large Format Silver – 2oz, 5oz, 10oz

Coin	Size	Inner ⌀	Recommended Capsule
Queen's Beasts 2oz Silver	2 oz	38.61 mm	39 mm
Koala 5oz Silver	5 oz	65.0 mm	65 mm
Kookaburra 5oz Silver	5 oz	65.0 mm	65 mm
Kookaburra 10oz Silver	10 oz	75.0 mm	80 mm
Koala 10oz Silver	10 oz	75.0 mm	80 mm

Available Capsule Sizes at CelticGold

Capsules from €0.39 (small sizes) and €0.49 (medium sizes) – the 80mm specialist capsule is priced separately at €6.00:

21.5mm · 23mm · 23.5mm · 24mm · 24.5mm · 26mm · 29.5mm · 31.5mm · 33mm · 33.5mm · 34mm · 35mm · 35.5mm · 36mm · 46mm · 49mm · 50mm · 55mm · 60mm · 65mm · 80mm

All accessories: Accessories overview. Tubes: Coin Tubes. Boxes: Presentation Boxes. Storage: Vault Storage. Questions: Contact us.

FAQ

What size capsule fits a Rectangular Dragon coin? Rectangular coins require specialist capsules – standard round capsules do not fit. Contact our team for the correct dimensions for your specific rectangular coin.

Silver tarnishes in capsules – how do I prevent this? Use airtight capsules for silver. Standard capsules with a small air gap allow slow oxidation over years. Airtight models prevent this. Avoid storing silver in environments with high sulphur content (some rubber materials, wool).

Can I mix different coins in one capsule? No – each capsule should contain one coin only. Mixing coins of different sizes causes movement and surface contact damage.