Compare body length, width and cord length
Use the body measurements for a like-for-like comparison.
Check what overall length includes
The purple Bang wired model lists 6.7 inches overall and 2.6 inches insertable. That first figure includes its 4.1-inch cord. Match each figure to the part it measures.
Check the exact variant
The available Bang XL is pink, but the written measurements accompany a black color label. Ask the maker or retailer whether those figures also apply to the pink SKU.