diff --git a/cli/state.go b/cli/state.go
index 8de612128..7576f6f77 100644
--- a/cli/state.go
+++ b/cli/state.go
@@ -24,6 +24,7 @@ var stateCmd = &cli.Command{
 		stateGetActorCmd,
 		stateLookupIDCmd,
 		stateReplaySetCmd,
+		stateSectorSizeCmd,
 	},
 }
 
@@ -334,3 +335,35 @@ var stateLookupIDCmd = &cli.Command{
 		return nil
 	},
 }
+
+var stateSectorSizeCmd = &cli.Command{
+	Name:  "sector-size",
+	Usage: "Look up miners sector size",
+	Action: func(cctx *cli.Context) error {
+		api, closer, err := GetFullNodeAPI(cctx)
+		if err != nil {
+			return err
+		}
+		defer closer()
+
+		ctx := ReqContext(cctx)
+
+		if !cctx.Args().Present() {
+			return fmt.Errorf("must pass address of actor to get")
+		}
+
+		addr, err := address.NewFromString(cctx.Args().First())
+		if err != nil {
+			return err
+		}
+
+		ssize, err := api.StateMinerSectorSize(ctx, addr, nil)
+		if err != nil {
+			return err
+		}
+
+		fmt.Printf("%d\n", ssize)
+
+		return nil
+	},
+}
diff --git a/miner/miner.go b/miner/miner.go
index 98def0e07..cabee16fd 100644
--- a/miner/miner.go
+++ b/miner/miner.go
@@ -270,7 +270,7 @@ func (m *Miner) mineOne(ctx context.Context, addr address.Address, base *MiningB
 		return nil, nil
 	}
 
-	log.Infof("Time delta between now and our mining base: %ds", uint64(time.Now().Unix())-base.ts.MinTimestamp())
+	log.Infof("Time delta between now and our mining base: %ds (nulls: %d)", uint64(time.Now().Unix())-base.ts.MinTimestamp(), base.nullRounds)
 
 	ticket, err := m.computeTicket(ctx, addr, base)
 	if err != nil {