What Size Smash Cake Do You Need?

If you’re thinking about making a smash cake for your little one’s birthday, you might be wondering what size you need. Here’s a quick guide to help you choose the right size smash cake for your party.

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General Guidelines

When it comes to smash cakes, you generally want to choose a size that is proportionate to the number of guests you will be serving. For example, if you are having a small party with 10 guests, you would not need a giant cake.

Number of Servings

A cake that is 4-inches tall and 6-inches in diameter can serve up to 10 people. This will give each person a 2-inch x 2-inch piece of cake.

Age of Child

The age of your child will play a big role in deciding what size smash cake to get. A good rule of thumb is to get a cake that is 4-inches wide for every year your child has been alive. So, if your child is turning 3 years old, you would want to get a 12-inch wide cake.


When deciding what size smash cake to get, it’s important to consider any allergies your guests may have. You’ll want to make sure there is a safe option for everyone to enjoy. If you’re not sure what kind of cake to get, talk to your baker or check out our allergy-friendly cake guide.

Cake Size

When it comes to smash cakes, you have two options: 6-inch or 8-inch. So, which size should you get? It really depends on a few factors. Let’s take a look at a few things you should consider before making your decision.

6-Inch Cake

A six-inch cake is a great size for a small party or gathering. This size cake can serve up to eight people and is ideal for small gatherings. This cake can also be used as a topper on a larger cake.

8-Inch Cake

This 8-inch cake will serve between 12 and 16 people. It will be about 4 inches tall.

10-Inch Cake

A 10-inch cake will serve between 24 and 30 people.

This size is perfect for a birthday party, engagement party, or even a small wedding reception. If you are planning on having a lot of people at your event, it is always best to order a few extra slices just in case.

Smash Cake Toppers

A smash cake is a small cake that is given to a baby on their first birthday. It is meant to be destroyed and eaten by the baby. Smash cakes are a fun way to celebrate a baby’s birthday. They are also a great way to get messy!

Fondant Toppers

If you are looking to have a fondant smash cake topper made, the most important thing to do is choose the right size. The last thing you want is for your topper to be too big or too small for your cake. Here is a guide to help you choose the right size smash cake topper:

2” to 3” – this size is good for cupcakes or mini cakes. It will give you a nice decoration without being too overbearing.

4” to 5” – this size is perfect for a variety of cakes, including 6”, 8”, and 10” cakes. It will give your cake a nice focal point without being too big.

6” to 8” – this size is perfect for larger cakes, such as 12” and 14” cakes. It will give your cake a beautiful decoration that will make a statement.

Buttercream Toppers

For a small smash cake, you will need about ½ cup of buttercream. This will be enough to cover the cake and create some simple decorations. If you want to create a more elaborate design, or if you have a larger cake, you will need 1 cup of buttercream.

Sugar Paste Toppers

Smash cakes are small, single-serving cakes that are given to babies and toddlers on their first birthdays. These special treats are meant to be destroyed – hence the name “smash cake” – and they provide a fun (and messy) way for little ones to celebrate their big day.

If you’re planning to make a smash cake for your child’s first birthday, one of the first questions you’ll need to answer is what size smash cake to make. There are a few factors to consider when deciding on the size of your smash cake, including the number of guests you’re expecting, the age of your child, and how much cake you want them to eat.

One general rule of thumb is that you should plan on one Smash Cake per every ten guests. So, if you’re expecting 20 people at your child’s birthday party, you should make two Smash Cakes – one for them to destroy, and one for everyone else to enjoy.

The age of your child is also an important factor in deciding how big (or small) their smash cake should be. For example, if you have a very young baby who isn’t yet eating solid food, you might want to make a very small Smash Cake that they can safely gnaw on. On the other hand, if you have an older toddler who is likely to eat a lot of cake, you might want to make a bigger Smash Cake so they can really indulge.

Finally, it’s important to consider how much cake you actually want your child to eat. If you want them to have a lot of fun smashing and playing with their cake but don’t necessarily want them eating too much sugar, a smaller Smash Cake might be the way to go. However, if you’re okay with them eating a bit more sugar and just want them to enjoy their birthday treat, a larger Smash Cake might be better suited for your needs.

When it comes down to it, there is no right or wrong answer when it comes to choosing the size of your child’s Smash Cake. The most important thing is that they have fun and enjoy themselves – whether that means destroying a huge cake or just nibbling on a small one.