Measure the girth around the broadest part of the chest and add 2".
To determine proper size measure the circumference of your pets neck and add 1-2", 1/2" - 5/8" width is best for puppies and small dogs. 5/8"- 3/4" width is best for small to medium dogs. 1" - 1 1/4" width is best for large dogs. ( AND PLEASE REMEMBER TO ALWAYS KEEP A CLOSE CHECK ON THEM SO THEY NEVER GET TO TIGHT AROUND THEIR LITTLE NECKS )
Measure the length of your pets back from the base of their neck to the base of their tail, if the measurement is between sizes going up 1 size is recommended also if your pet has a stout build, a deep chest or is over weight I recommend to go up a minimun of 1 size for proper fit, If a dog is long backed like a Dachshund a smaller size is recommended.
For shorter mid-drift style garments measure the length of your pets back from base of their neck to the base of their tail but due to the unique styling of mid-drift garments they may sit higher on the dogs back.
FOR PROPER FIT OF A HAT FOR YOUR DOG MEASURE THE LEHTTH OF THE HEAD FROM 1/2" ABOVE THE DOGS BROW TO THE BACK OF THEIR HEAD.
THE CORRECT WAY TO MEASURE YOUR DOG FOR BOOTS OR SHOES IS WHILE THE DOG IS STANDING MEASURE FROM THE FRONT EDGE (NAIL SIDE) OF THE SMALL PADS ( BOTTOM OF FOOT ) TO THE BACK EDGE OF THE LARGE PAD (BOTTOM FOOT BACK SIDE) ( DO NOT INCLUDE THE NAILS) i RECOMMEND THAT YOU PLACE THEIR FOOT ON A PIECE OF PAPER, MARKING THE PAPER AT THE FRONT AND BACK OF THE FOOT THEN MEASURING BETWEEN MARKS ON THE PAPER.
IN ORDER TO GET THE CORRECT SIZE PET BED FOR YOUR DOG WHEN DOG IS LAYING DOWN, MEASURE PETS BODY LENGTH FROM BASE OF TAIL TO TIP OF NOSE, AND ADD A MINIMUM OF 9"-12". FOR BOLSTER OR SNUGGLE STYLE BEDS ADD A MINIMUM OF 5"-7" THEY SHOULD BE VERY COMFORTABLE NOW.