Quote:EdK
Those look like 1.25" shanks. 
Ed
Pretty darn close Ed! A touch over at 1.259".
Those are all 32mm metric shank tools.
You can always tell from the nomenclature in a couple of ways. One, the "3232" means it's 32mm square. If it were an "inch" size holder and had only ONE "32", that would be 32 "sixteenths" of an inch, making it a 2" holder.
Another indicator is the "P27" and "P22". That denotes the insert size in ISO form, so the long edge of the inserts is 27mm and 22mm, respectively.
The top one takes a square negative rake insert, an SNMG1506xx (SNMG54x in ANSI) size. It's a big one, but great for lead angle roughing (with a high horsepower machine) or for putting BIG chamfers on a part.
The next two are identical MTJNR3232P27's, which take a BIG triangular negative rake insert TNMG2706xx (TNMG54z) insert and hold it's cutting edge at a -3º angle to the shank for turning up to a shoulder and allow facing out to clean it square.
The bottom one is also an MTJNR3232 but takes the smaller and more common TNMG2204xx (TNMG43x) inserts at the same -3º angle.
I would suggest just selling them off to get the proper 5/8" / 16mm holders with smaller (and less expensive) inserts more appropriate for your size lathe. Look for holders that use WNMG, CNMG, DNMG and VNMG inserts. Those would be:
DWLNR 103, MWLNR 103 (ANSI-inch), DWLNR1616 H06, MWLNR1616 H06 (ISO-metric)
DCLNR 103, MCLNR 103 (ANSI-inch), DCLNR1616 H09, MCLNR1616 H06 (ISO-metric)
DDJNR 103, MDJNR 103 (ANSi-inch), DDJNR1616 K11, MDJNR1616 K11 (ISO-metric)
DVJNR 103, MVJNR 103 (ANSI-inch), DVJNR1616 K16, MVJNR1616 K16 (ISO-metric)