Sonic Drive-In is known for its expansive drink menu, and at the heart of it all is the legendary Sonic Slush. Whether you’re cooling off on a hot summer day, looking for a sweet treat after a burger, or just craving something different, Sonic Slushes are a fan favorite. But if you’re wondering what Sonic slush sizes are available and which one suits your appetite, you’re not alone.
In 2024, Sonic continues to offer slushies in a wide range of sizes to meet every customer’s needs. From kid-friendly portions to extra-large thirst-quenchers, this guide breaks down all the sizes, ounces, prices, and tips to help you make the best slush decision every time.
What Are the Sonic Slush Sizes Available in 2024?
Sonic slushes come in five main sizes, each with its own ideal use depending on how much slush you’re in the mood for. Whether it’s a small slush as a quick pick-me-up or a Route 44 to last through your afternoon commute, Sonic has something for everyone.
Breakdown of Sonic Slush Sizes:
| Slush Size | Fluid Ounces (oz) | Ideal For |
| Small | 14 oz | Light refreshment or side treat |
| Medium | 20 oz | Standard drink with any combo |
| Large | 32 oz | Great for longer enjoyment |
| Route 44 | 44 oz | Perfect for road trips or sharing |
| Wacky Pack | 10 oz | Kids’ meals or very light servings |
All sizes are available for the full slush menu, including classic flavors, real fruit slushes, candy slushes, and limited-time specialty offerings like the Shark Week Slush or the Red, White & Blue Slush Float.
How Much Do Sonic Slushes Cost by Size?
Prices can vary slightly depending on your location, but here’s a general overview of average pricing for each Sonic slush size in 2024:
| Slush Size | Average Price (Classic Slush) |
| Wacky Pack | $1.29 – $1.49 |
| Small | $1.79 – $2.19 |
| Medium | $2.29 – $2.69 |
| Large | $2.69 – $2.99 |
| Route 44 | $2.99 – $3.49 |
Premium or candy-infused slushes like those with Nerds, popping boba, or real fruit will have slightly higher prices due to the additional ingredients.
Calories and Sugar Content Per Slush Size
Sonic slushes are sweet treats, so it’s useful to be mindful of calorie counts if you’re watching your intake. Here’s an estimated breakdown for a basic Blue Raspberry Slush:
| Size | Calories | Sugar (g) |
| Wacky Pack | 90–100 | 22–24g |
| Small | 180–200 | 45–50g |
| Medium | 240–260 | 60–70g |
| Large | 310–340 | 85–95g |
| Route 44 | 410–450 | 110–120g |
Fruit and candy slushes will be slightly higher depending on toppings and syrups used. For lighter options, you can ask for “light syrup” or “half sugar” at most locations.
Popular Slush Flavors Available in All Sizes
Sonic’s slush menu is both massive and customizable. Here are the most popular flavors you can enjoy in any size:
Classic Flavors:
- Blue Raspberry
- Cherry
- Watermelon
- Grape
- Green Apple
- Orange
- Lemonade
- Limeade
Real Fruit Slushes:
- Strawberry
- Mango
- Peach
- Lemon
- Lemon Berry
Candy and Specialty Slushes:
- Nerds Slush (with candy pieces)
- Shark Week Slush (seasonal)
- Red, White & Blue Slush Float (summer special)
- Boba Slushes (limited-time flavors)
Every flavor is available in small, medium, large, Route 44, and even kids’ Wacky Pack size.
Tips for Choosing the Right Sonic Slush Size
For a Light Treat: Go Small or Wacky Pack
If you’re pairing a slush with a full meal, the small or Wacky Pack size is the perfect companion—sweet but not overwhelming.
For Average Thirst: Stick to Medium
The medium is the standard Sonic drink size and balances quantity and refreshment. It’s the most commonly ordered size.
For Sharing or Long Sips: Large or Route 44
Great for road trips or splitting with a friend. Just note: the sugar count can be high, so enjoy it mindfully.
Happy Hour Hack: Route 44 for Half Price
Ordering during Sonic Happy Hour (2–4 PM) or via the Sonic app gives you half-price slushes, including the massive Route 44. That’s 44 ounces of icy flavor for less than $2!
Try Custom Combinations
You can combine flavors or add Nerds, candy, real fruit, or boba to any size. Each customization may add a few cents but makes for a truly unique slush.
Does Size Affect Flavor Strength or Topping Distribution?
Yes, in larger sizes, flavor syrup and toppings may settle differently. To keep the flavor consistent:
- Ask for “extra syrup” in Route 44s
- Stir before drinking to evenly distribute mix-ins
- Request layered flavor if you want syrup at the bottom for a burst finish
The smaller the cup, the more concentrated the syrup-to-ice ratio, making small slushes feel slightly sweeter.
Can You Refill or Split Sonic Slush Sizes?
Sonic doesn’t offer free refills on slushes, but you can:
- Split a Route 44 into two cups (especially helpful for kids)
- Use the app to order multiple sizes with the same base flavor for group orders
- Request extra gummies or candy to stretch the flavor experience
If you’re planning a party or road trip, ordering multiple mediums or Route 44s is usually the most cost-effective way to go.
Sonic Slush Sizes vs. Drink Sizes: Are They the Same?
Yes, Sonic’s slush sizes align with their soda and drink sizes. So if you’re familiar with a Route 44 Cherry Limeade or a medium soda, your slush will be the same volume.
Here’s a reminder of Sonic’s drink size chart:
| Size Name | Fluid Ounces (All Beverages) |
| Wacky Pack | 10 oz |
| Small | 14 oz |
| Medium | 20 oz |
| Large | 32 oz |
| Route 44 | 44 oz |
Best Sonic Slush Combos by Size
Looking for a combo idea? Try these:
- Small Slush + Jr. Breakfast Burrito – Perfect for light morning refreshment
- Medium Slush + Cheeseburger + Tots – Classic Sonic combo
- Large Slush + Chicken Slinger + Onion Rings – Great for longer lunches
- Route 44 Slush + Mozzarella Sticks – Shareable and fun combo
FAQs About Sonic Slush Sizes
How many ounces are in a small slush at Sonic?
A small Sonic slush contains approximately 14 ounces of icy, flavored refreshment.
What is a Route 44 slush?
The Route 44 slush is the largest drink size Sonic offers, containing 44 ounces of slush—great for sharing or long sipping.
Can I customize a slush size with extra candy or syrup?
Yes, all sizes can be customized with extra syrup, Nerds, fruit, or gummies. Additional charges may apply.
Are all slush flavors available in every size?
Yes, you can order any Sonic slush flavor in small, medium, large, Route 44, or Wacky Pack sizes.
Is there a kids’ slush size?
Yes, the Wacky Pack size (10 oz) is designed for kids’ meals and is available for all standard slush flavors.
