My old 3/4 bassbag dont fit my new bass. The size of my new bass is:
Total length: 72.5 inch, Body width: 27,19 inch. Chest width: 19.7 inch. Side Body depth: 8.67 inch, mensur: 41.76.
What size is it? Do i need to buy a 4/4 bass-bag?
You have a 3/4 or small 7/8 Bass. The cheap Bags on the market fit the Cheap Chinese sloped shoulder smaller 3/4 Basses. My Italian 3/4 barely fits in that type 4/4 case and my big 7/8 does not fit at all. Many threads exhist about this. Buy a better brand of 3/4 case and you will not have the problem. Your Lower Bout may be wider than most so shop around and get the Bag that fits best. There are no standard size cases as there are no standard size Basses either. Oh, Body length is important too.
Size? 
