The small and large packs has nearly the same value.
Animal Crossing: Pocket Camp are celebrating the start of 2018 with free Leaf Tickets, and two "New Year's Party Packs," which are detailed below:
Per Leaf Ticket
|New Year's Party Pack S||$1.99||60 (including 20 bonus)||$0.033||1 Calling Card|
|New Year's Party Pack L||$20.99||700 (including 283 bonus)||$0.030||1 Calling Card|
Those deals ends on January 4, 2018 at 7:59 p.m. and is limited to one purchase per person.
The free Leaf Tickets has already been sent to your mailbox. You just need to collect them by January 31, 2018 at 7:59 p.m.