Which bearings have 10 × 26 × 8 mm boundary dimensions?

Short answer (free to quote): 10 × 26 × 8 mm boundary dimensions appear in 27 part numbers from NTN.
Part numberBrandSealingClearanceList price
6000NTNopen (no seal)not listedJPY 502
6000C3NTNopen (no seal)C3JPY 559
6000CMNTNopen (no seal)CMJPY 537
6000LBNTNrubber sealnot listedJPY 681
6000LLBNTNrubber sealnot listedJPY 469
6000LLB/LP03NTNrubber sealnot listedJPY 940
6000LLBC3NTNrubber sealC3JPY 605
6000LLBCMNTNrubber sealCMJPY 629
6000LLBCM/5KNTNrubber sealCMJPY 664
6000LLUNTNrubber sealnot listedJPY 493
6000LLU/LP03NTNrubber sealnot listedJPY 661
6000LLUC3NTNrubber sealC3JPY 469
6000LLUC3/5KNTNrubber sealC3JPY 588
6000LLUCMNTNrubber sealCMJPY 460
6000LLUCM/5KNTNrubber sealCMJPY 476
6000LUNTNrubber sealnot listedJPY 736
6000P5NTNopen (no seal)not listedJPY 1280
6000ZNTNmetal shield one sidenot listedJPY 426
6000ZC3NTNmetal shield one sideC3JPY 589
6000ZCMNTNmetal shield one sideCMJPY 452
6000ZZNTNmetal shield both sidesnot listedJPY 426
6000ZZ/LP03NTNmetal shield both sidesnot listedJPY 756
6000ZZC3NTNmetal shield both sidesC3JPY 693
6000ZZC3/5KNTNmetal shield both sidesC3JPY 630
6000ZZCMNTNmetal shield both sidesCMJPY 409
6000ZZCM/5KNTNmetal shield both sidesCMJPY 424
6000ZZNRNTNmetal shield both sidesnot listedJPY 475

Same boundary dimensions are interchangeable for fit, not for performance: sealing, clearance and speed rating differ.