How? Simply put, because we  have learned know how to pack them!  When we first began shipping clip frames, we experienced high breakages claim rates which, however,  gradually decreased as our packing knowledge increased with time.  In addition,  we also learned that the the largest size glass clip frame we can safely ship is (A3 or 29.7 x 42 cm) after which, for the larger sizes,  we changed to plastic glass glazing.  Nevertheless, and in essence, we pack all glass clip frames with three layers of protective materials which reduces our to damages claim rate to about .01% .  In the quite rare occasions that the glazing in the clip frames, photo frames, certificate frames or clip frames does break, we either refund the cost of the broken items or ship ...