Please find probabilities to all Sticker Packs below:
1. Starter Pack   
Number of Stickers: 2
Guaranteed Rarity: Contains at least one 1★ sticker.
Probabilities: 
1★ - 50%
2★ - 30%
3★ - 12%
4★ - 6%
5★ - 2%
2. Common Pack   
Number of Stickers: 2
Guaranteed Rarity: Contains at least one 2★ sticker.
Probabilities: 
1★ - 20%
2★ - 45%
3★ - 16%
4★ - 11%
5★ - 8%
3. Uncommon Pack   
Number of Stickers: 3
Guaranteed Rarity: Contains at least one 3★ sticker.
Probabilities: 
1★ - 20%
2★ - 20%
3★ - 35%
4★ - 15%
5★ - 10%
4. Rare Pack   
Number of Stickers: 3
Guaranteed Rarity: Contains at least one 4★ sticker.
Probabilities: 
1★ - 18%
2★ - 18%
3★ - 25%
4★ - 28%
5★ - 11%
5. Epic Pack   
Number of Stickers: 4
Guaranteed Rarity: Contains at least one 5★ sticker.
Probabilities: 
1★ - 15%
2★ - 18%
3★ - 22%
4★ - 30%
5★ - 15%
6. Large Starter Pack   
Number of Stickers: 3
Guaranteed Rarity: Contains at least one 1★ sticker.
Probabilities: 
1★ - 40%
2★ - 30%
3★ - 20%
4★ - 6%
5★ - 4%
7. Large Common Pack    
Number of Stickers: 3
Guaranteed Rarity: Contains at least one 2★ sticker.
Probabilities: 
1★ - 20%
2★ - 40%
3★ - 19%
4★ - 13%
5★ - 8%
8. Large Uncommon Pack   
Number of Stickers: 4
Guaranteed Rarity: Contains at least one 3★ sticker.
Probabilities: 
1★ - 15%
2★ - 22%
3★ - 35%
4★ - 18%
5★ - 10%
9. Large Rare Pack   
Number of Stickers: 4
Guaranteed Rarity: Contains at least one 4★ sticker.
Probabilities: 
1★ - 15%
2★ - 22%
3★ - 35%
4★ - 18%
5★ - 10%
10. Large Epic Pack   
Number of Stickers: 5
Guaranteed Rarity: Contains at least one 5★ sticker.
Probabilities: 
1★ - 15%
2★ - 17%
3★ - 18%
4★ - 30%
5★ - 20%
11. Mega Starter Pack   
Number of Stickers: 4
Guaranteed Rarity: Contains at least one 1★ sticker.
Probabilities: 
1★ - 40%
2★ - 30%
3★ - 20%
4★ - 6%
5★ - 4%
12. Mega Common Pack   
Number of Stickers: 4
Guaranteed Rarity: Contains at least one 2★ sticker.
Probabilities: 
1★ - 20%
2★ - 45%
3★ - 17%
4★ - 13%
5★ - 5%
13. Mega Uncommon Pack   
Number of Stickers: 5
Guaranteed Rarity: Contains at least one 3★ sticker.
Probabilities: 
1★ - 15%
2★ - 22%
3★ - 35%
4★ - 18%
5★ - 10%
14. Mega Rare Pack   
Number of Stickers: 5
Guaranteed Rarity: Contains at least one 4★ sticker.
Probabilities: 
1★ - 15%
2★ - 20%
3★ - 20%
4★ - 30%
5★ - 15%
15. Mega Epic Pack   
Number of Stickers: 6
Guaranteed Rarity: Contains at least one 5★ sticker.
Probabilities: 
1★ - 5%
2★ - 15%
3★ - 20%
4★ - 25%
5★ - 35%