A charging system for articles of footwear, comprising: a first charging device comprising an external inductive loop disposed within a portion of the first charging device; a first article of footwear and a second article of footwear, the first article of footwear including a first sole structure and the second article of footwear including a second sole structure; wherein the first sole structure comprises a first midsole, and wherein the second sole structure comprises a second midsole; wherein the first midsole has a first size and the second midsole has a second size, wherein the first size is larger than the second size; characterized in that: the first sole structure further comprises a first sole plate, and the second sole structure comprises a second sole plate; the first sole plate includes a first cavity with a first component, and wherein the second sole plate includes a second cavity with a second component; a volume of the first cavity is substantially similar to a volume of the second cavity; the first component includes a first internal inductive loop and wherein the second component includes a second internal inductive loop; and the portion of the first charging device which includes the external inductive loop is configured to be snugly received by: a first recess that is present between the first cavity and the first midsole, to align the external inductive loop with the first internal inductive loop which is disposed adjacent an exposed outer surface of the first cavity, for charging the first article of footwear; and a second recess that is present between the second cavity and the second midsole, to align the external inductive loop with the second internal inductive loop which is disposed adjacent an exposed outer surface of the second cavity, for charging the second article of footwear. a first charging device comprising an external inductive loop disposed within a portion of the first charging device; a first article of footwear and a second article of footwear, the first article of footwear including a first sole structure and the second article of footwear including a second sole structure; wherein the first sole structure comprises a first midsole, and wherein the second sole structure comprises a second midsole; wherein the first midsole has a first size and the second midsole has a second size, wherein the first size is larger than the second size; characterized in that: the first sole structure further comprises a first sole plate, and the second sole structure comprises a second sole plate; the first sole plate includes a first cavity with a first component, and wherein the second sole plate includes a second cavity with a second component; a volume of the first cavity is substantially similar to a volume of the second cavity; the first component includes a first internal inductive loop and wherein the second component includes a second internal inductive loop; and the portion of the first charging device which includes the external inductive loop is configured to be snugly received by: a first recess that is present between the first cavity and the first midsole, to align the external inductive loop with the first internal inductive loop which is disposed adjacent an exposed outer surface of the first cavity, for charging the first article of footwear; and a second recess that is present between the second cavity and the second midsole, to align the external inductive loop with the second internal inductive loop which is disposed adjacent an exposed outer surface of the second cavity, for charging the second article of footwear. a first recess that is present between the first cavity and the first midsole, to align the external inductive loop with the first internal inductive loop which is disposed adjacent an exposed outer surface of the first cavity, for charging the first article of footwear; and a second recess that is present between the second cavity and the second midsole, to align the external inductive loop with the second internal inductive loop which is disposed adjacent an exposed outer surface of the second cavity, for charging the second article of footwear.