This is a pet backpack with adjustable straps. The XS size fits our regular XS measurements. The S/M fits our Small and Medium measurements. The M/L fits our Medium and large measurements. our XL Fits our Regular XL measurements.
The measurements of the back packs are:
XS - 5in x 4in
S/M - 6x6in
M/L - 10X11in
XL - 12x13 in
