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Finding the right card sleeves starts with two decisions: choosing the correct size and choosing the level of protection that suits your game.

At Mayday Games EU, you can shop card sleeves from both Mayday Games and Sleeve Kings. The two brands cover many of the same popular card dimensions, but they offer different thicknesses, pack quantities and product options.

This guide will help you measure your cards, understand sleeve dimensions, compare the two brands and calculate how many packs you need.

How to Measure Cards for Sleeves

Remove one card from the game and place it flat on a clean surface. Use a metric ruler or digital calliper for the most accurate result.

Step 1: Measure the card from its left edge to its right edge. This is the width.

Step 2: Measure from the bottom edge to the top edge. This is the height.

Step 3: Record the measurement as width × height in millimetres. For example, a card measuring 63.5 mm wide and 88 mm high is written as 63.5 × 88 mm.

Step 4: Measure several cards from different decks in the box. Some games contain multiple card sizes, and small manufacturing variations can occur.

Always measure the card itself rather than an old sleeve. Sleeve measurements may include seams and manufacturing allowances, so measuring an existing sleeve can lead you to the wrong product.

What Do the Sizes in Product Names Mean?

A product labelled 63.5 × 88 mm is designed for cards measuring approximately 63.5 × 88 mm. The sleeve itself needs to be slightly larger than the card so the card can slide inside without its edges bending.

Do not try to match the outside dimensions of a sleeve exactly to your card. Instead, use the compatible card size shown in the product name and description.

If your measurement falls between two sizes, check the individual product page before ordering. Choosing a sleeve that is too tight can damage card edges, while a sleeve that is too large may move around during play or fit poorly inside the game insert.

Mayday Games or Sleeve Kings: Which Should You Choose?

Both brands are suitable for protecting board game and card game collections. The best choice depends on the sleeve feel, pack quantity and product range you prefer.

Pack quantities can vary between individual products. Always confirm the selected size and protection level on the product page before calculating how many packs to order.

Shop Mayday Games Sleeves Shop Sleeve Kings Sleeves

Popular Card Sleeve Sizes

Mayday Games and Sleeve Kings both cover many common board game card formats. Use the table below as a starting point, then confirm availability and product details through the relevant collection.

The EU store carries many additional sizes, including square, oversized and game-specific formats. If your cards do not match one of the common sizes above, browse the complete collections rather than choosing the nearest size.

Standard, Premium or Perfect Fit?

Standard sleeves

Standard sleeves are a practical choice when a game contains hundreds of cards, you want to keep the finished decks relatively compact or you need an economical way to sleeve a large collection.

Sleeve Kings Standard sleeves are generally 60 microns thick and come in packs of 110. Mayday Games also offers Standard options for many popular sizes, commonly in packs of 100. Confirm the pack quantity on the individual product page.

Premium sleeves

Premium sleeves provide a thicker and more substantial feel. They can be a good choice for frequently played games, valuable collections or decks that are shuffled repeatedly.

Sleeve Kings Premium sleeves are 100 microns thick and contain 55 sleeves per pack. Mayday Games Premium pack quantities are commonly 50 sleeves, although you should confirm the selected option before ordering.

Browse Sleeve Kings Premium sleeves.

Perfect Fit sleeves

Perfect Fit sleeves are designed to sit closely around compatible cards and may be used as inner sleeves as part of a double-sleeving setup. They should not be treated as a universal replacement for regular outer sleeves.

For double sleeving, confirm that the inner sleeve fits the card and that the sleeved card fits comfortably inside the selected outer sleeve. Combining products solely because they display similar dimensions may not produce the intended fit.

Browse Sleeve Kings Perfect Fit Premium sleeves.

How Many Packs Do You Need?

Count every card you plan to sleeve, including expansion cards and promotional cards. Divide that total by the number of sleeves in one pack, then round up to the next whole number.

Example with Sleeve Kings Standard: A game has 225 cards. A Standard pack contains 110 sleeves. You will need three packs, giving you 330 sleeves.

Example with Sleeve Kings Premium: The same game has 225 cards. A Premium pack contains 55 sleeves. You will need five packs, giving you 275 sleeves.

Example with Mayday Games Standard: If the selected product contains 100 sleeves per pack, a 225-card game requires three packs.

Example with Mayday Games Premium: If the selected product contains 50 sleeves per pack, a 225-card game requires five packs.

A few spare sleeves can be useful for replacing damaged sleeves or adding future promotional cards. However, sleeves increase the thickness and volume of every deck, so check whether the completed decks will still fit inside the original game insert.

What If Your Game Uses Several Card Sizes?

Many board games contain more than one card format. Separate the cards into groups, measure each group and count them independently.

For example, a game may require Mini Euro sleeves for resource cards, Card Game sleeves for the main deck and Tarot sleeves for character cards. Adding all cards together before identifying their sizes will produce the wrong number of packs.

You can also explore ready-made bundles where available:

Browse Mayday Games bundles
Browse Sleeve Kings bundles

Common Card Sleeve Sizing Mistakes

Measuring an old sleeve: Measure the card itself because sleeve seams and outer dimensions can be misleading.

Assuming every card uses the same format: Sort and measure each group of cards separately.

Relying only on the name of the game: Card sizes can change between editions, printings and regional versions.

Choosing the nearest size without checking: A difference of only one or two millimetres can determine whether a sleeve fits.

Comparing brands only by pack price: Remember to compare the number of sleeves, sleeve thickness and total packs required.

Forgetting storage space: Premium sleeves and double sleeving can substantially increase deck thickness.

Frequently Asked Questions

Are Mayday Games and Sleeve Kings sizes interchangeable?

Many products are designed for the same card dimensions, but the finished fit, thickness and pack quantity can differ. Match the card measurement first, then check the description of the individual product rather than assuming every similarly named sleeve is identical.

Which brand is better for games with hundreds of cards?

This depends on the feel and protection level you want. Sleeve Kings Standard packs contain 110 sleeves and can reduce the number of packs required. Mayday Games Standard options are also suitable for large games. Compare the final pack count and selected product specifications before ordering.

Which sleeves are better for frequently shuffled cards?

Players who prefer a more substantial feel may choose Premium sleeves. Standard sleeves remain a practical option when reducing deck thickness or sleeving a very large number of cards is the priority.

Should a sleeve be exactly the same size as the card?

The internal space needs to accommodate the card without bending its edges. Choose a sleeve designed for the measured card size instead of looking for an outside sleeve measurement that exactly matches the card.

Can a slightly larger sleeve still work?

A small amount of clearance is normal. An unnecessarily large sleeve, however, may allow the card to move, make shuffling less comfortable or cause problems with the game insert.

Why can two editions of the same game need different sleeves?

Publishers sometimes change card dimensions between printings, editions and regional releases. Online compatibility lists may also contain older information, so measuring the physical cards is always recommended.

Can I combine an inner sleeve from one brand with an outer sleeve from another?

It may be possible, but dimensions shown in product names do not guarantee a compatible double-sleeving combination. Test the fit before sleeving an entire collection and never force a card into a tight combination.

Find the Right Sleeves for Your Collection

Measure your cards in millimetres, confirm how many cards of each size you have and decide whether Standard, Premium or Perfect Fit protection best suits the way you play.

You can then compare Mayday Games and Sleeve Kings products at Mayday Games EU.

Shop Mayday Games Sleeves Shop Sleeve Kings Sleeves

If you are still unsure which sleeve size to choose, contact us at support@maydaygames.eu. Include the width and height of your cards, the card count and the edition of the game whenever possible.